Dava Newman: Space Exploration, Space Suits, and Life on Mars
嘉宾：Dava Newman
全文文稿 · 按对话顺序保留完整内容，深入理解上下文。
§01Transcript · 00:00–08:40
The following is a conversation with Dava Newman.
She's the Apollo Program Professor at MIT
and the former Deputy Administrator of NASA
and has been a principal investigator
on four spaceflight missions.
Her research interests are in aerospace
biomedical engineering, investigating human performance
in varying gravity environments.
She has designed and engineered and built
some incredible spacesuit technology,
namely the bio suit that we talk about in this conversation.
Due to some scheduling challenges on both our parts,
we only had about 40 minutes together.
And in true engineering style, she said,
I talk fast, you pick the best questions,
let's get it done.
And we did.
It was a fascinating conversation about space exploration
and the future of spacesuits.
This is the Artificial Intelligence Podcast.
If you enjoy it, subscribe on YouTube,
give it five stars on Apple Podcast,
support on Patreon, or simply connect with me on Twitter,
Alex Friedman, spelled F-R-I-D-M-A-N.
For the first time, this show is presented by Cash App,
the number one finance app in the App Store.
Cash App is the easiest way to send money to your friends.
And it is also the easiest way to buy,
sell and deposit Bitcoin.
Most Bitcoin exchanges take days for bank transfer
to become investable.
Through Cash App, it takes seconds.
Invest as little as $1 and now you own Bitcoin.
I have several conversations about Bitcoin
coming up on this podcast.
Decentralized digital currency
is a fascinating technology in general to explore,
both at the technical and the philosophical level.
Cash App is also the easiest way to try and grow your money
with their new investing feature.
Unlike investing tools that force you
to buy entire shares of stock,
Cash App amazingly lets you instantly invest
as little or as much as you want.
Some stocks in the market are hundreds,
not thousands of dollars per share.
And now you can still own a piece with as little as $1.
Brokerage services are provided by Cash App Investing,
a subsidiary of Square and member SIPC.
I'm also excited to be working with Cash App
to support one of my favorite organizations called FIRST,
which is best known for their FIRST Robotics
and Lego competitions that seeks to inspire young students
in engineering and technology fields all over the world.
That's over 110 countries, 660,000 students,
300,000 mentors and volunteers,
and a perfect rating on Charity Navigator,
which means the donated money
is used to maximum effectiveness.
When you sign up for Cash App
and use the promo code LEXPODCAST,
you'll instantly receive $10.
And Cash App will also donate $10 to FIRST,
an amazing organization that I've personally seen
inspire girls and boys to learn, to explore,
and to dream of engineering a better world.
Don't forget to use the code LEXPODCAST
when you download Cash App from the App Store
or Google Play Store today.
And now here's my conversation with Deva Newman.
You circumnavigated the globe on boat.
So let's look back in history.
500 years ago, Ferdinand Magellan's crew
was first to circumnavigate the globe, but he died.
I think people don't know, like halfway through,
and so did 242 of the 260 sailors
that took that three-year journey.
What do you think it was like for that crew at that time,
heading out into the unknown to face probably likely death?
Do you think they were filled with fear, with excitement?
Probably not fear.
I think in all of exploration,
the challenge and the unknown, so probably wonderment.
And then just when you really are sailing
the world's oceans, you have extreme weather of all kinds.
When we were circumnavigating, it was challenging,
a new dynamic you really appreciate, Mother Earth,
you appreciate the winds and the waves.
So back to Magellan and his crew,
since they really didn't have a three-dimensional map
of the globe, of the Earth when they went out,
just probably looking over the horizon,
thinking what's there, what's there?
So I would say the challenge had to be really important
in terms of the team dynamics and that leadership
had to be incredibly important.
Team dynamics, how do you keep people focused on the mission?
- So you think the psychology, that's interesting.
There's probably echoes of that
in the space exploration stuff we'll talk about.
So the psychology of the dynamics between the human beings
on the mission is important?
- Absolutely.
For a Mars mission, there's lots of challenges,
technology, but since I specialize
in keeping my astronauts alive, the psychosocial issues,
the psychology of psychosocial team dynamics, leadership,
we're all people, so that's always a huge impact,
one of the top three, I think,
of any isolated, confined environment,
in any mission that is really pretty extreme.
- So your Twitter handle is @davexplorer.
So when did you first fall in love
with the idea of exploration?
- Ah, that's a great question.
Maybe as long as I can remember,
as I grew up in Montana, in the Rocky Mountains,
in Helena, the capital, and so literally,
Mount Helena was my backyard, was right up there.
So exploring, being in the mountains, looking at caves,
just running around, but always being in nature.
So since my earliest memory is I think of myself
as kind of exploring the natural beauty
of the Rocky Mountains where I grew up.
- So exploration is not limited to any domain,
it's just anything, so the natural domain of any kind,
going out into the woods, into a place you haven't been,
it's all exploration.
- I think so, yeah, I have a pretty all-encompassing
definition of exploration.
- So what about space exploration?
When were you first captivated by the idea
that we little humans could venture out into the space,
into the great unknown of space?
- Oh, it's a great year to talk about that,
the 50th anniversary of Apollo 11,
since I was alive during Apollo,
and specifically Apollo 11, I was five years old,
and I distinctly remember that.
I remember that humanity, I'm sure I probably
didn't know their names at the time,
there's Neil Armstrong, Buzz Aldrin,
and never forget Michael Collins in orbit.
Those three men doing something that just seemed impossible,
seemed impossible a decade earlier, even a year earlier,
but so the Apollo program really inspired me,
and then I think it actually just taught me to dream,
to any impossible mission could be possible
with enough focus.
I'm sure you need some luck,
but you definitely need the leadership,
you need the focus of the mission.
So since an early age, I thought,
of course, people should be interplanetary,
of course, we need people on Earth,
and we're gonna have people exploring space as well.
- That seemed obvious, even at that age, of course.
- It opened it up.
Before we saw men on the moon,
it wasn't obvious to me at all,
but once we understood that, yes, absolutely,
astronauts, that's what they do,
they explore, they go into space,
and they land on other planets or moons.
- So again, maybe a romanticized, philosophical question,
but when you look up at the stars,
knowing that there's at least 100 billion of them
in the Milky Way galaxy, right?
So we're really a small speck in this giant thing
that's the visible universe.
How does that make you feel about our efforts here?
- I love the perspective, I love that perspective.
I always open my public talks
with a big Hubble Space Telescope image,
looking out into, you mentioned just now,
the solar system, the Milky Way,
'cause I think it's really important to know
that we're just a small, pale blue dot.
We're really fortunate, we're on the best planet by far.
Life is fantastic here.
- That we know of.
You're confident this is the best planet?
- I'm pretty sure it's the best planet,
the best planet that we know of.
I mean, I search my research, as you know,
in mission worlds, and when will we find life?
I think actually probably the next decade
we find probably past life,
probably the evidence of past life on Mars, let's say.
- You think there was once life on Mars?
Or do you think there's currently?
- I'm more comfortable saying probably 3.5 billion years ago
feel pretty confident there was life on Mars,
just because then it had an electromagnetic shield,
it had an atmosphere, has a wonderful gravity level,
3HG is fantastic, you're all super human,
we can all slam dunk in basketball,
it's gonna be fun to play sports on Mars.
So I think we'll find past,
no, fossilized probably the evidence of past life on Mars.
§02Transcript · 08:43–16:08
Currently, that's again, we need the next decade,
but the evidence is mounting for sure.
We do have the organics, we're finding organics,
we have water, seasonal water on Mars.
We used to just know about the ice caps,
you know, North and South Pole,
now we have seasonal water.
We do have the building blocks for life on Mars.
We really need to dig down into the soil,
'cause everything on the top surface is radiated,
but once we find out, will we see any life forms,
will we see any bugs?
I leave it open as a possibility,
but I feel pretty certain that past life
or fossilized life forms we'll find.
And then we have to get to all these ocean worlds,
these beautiful moons of other planets,
since we know they have water,
and we're looking for simple search for life,
or follow the water, you know, carbon-based life,
that's the only life we know.
There could be other life forms that we don't know about,
but it's hard to search for them, 'cause we don't know.
So in our search for life in the solar system,
it's definitely, you know, search,
you know, let's follow the water,
and look for the building blocks of life.
- So you think in the next decade,
we might see hints of past life or even current life?
- I think so.
That's pretty optimistic. - I love the optimism.
- I'm pretty optimistic.
- Do humans have to be involved,
or can this be robots and rovers and--
- Probably teams, I mean, we've been at it,
on Mars in particular, 50 years.
We've been exploring Mars for 50 years.
Great data, right?
Our images of Mars today are phenomenal.
Now we know how Mars lost its atmosphere.
You know, we're starting to know,
because of the lack of the electromagnetic shield.
We know about the water on Mars.
So we've been studying 50 years with our robots.
We still haven't found it.
So I think once we have a human mission there,
we just accelerate things.
It's always humans and our rovers and robots together,
but we just have to think that 50 years,
we've been looking at Mars,
and taking images and doing the best science that we can.
People need to realize Mars is really far away.
It's really hard to get to.
You know, this is extreme, extreme exploration.
We mentioned Magellan first,
or all of the wonderful explorers and sailors of the past,
which kind of are lots of my inspiration for exploration.
Mars is a different ball game.
I mean, it's eight months to get there,
year and a half to get home.
I mean, it's really extreme.
- Harsh environment in all kinds of ways.
But the kind of organism we might be able to see hints of
on Mars are kind of microorganisms, perhaps.
- Yeah, and remember that humans,
we're kind of, you know, we're hosts, right?
We're hosts to all of our bacteria and viruses, right?
- Do you think it's a big leap from the viruses
and the bacteria to us humans?
Put another way, do you think on all those moons,
beautiful, wet moons that you mentioned,
you think there's intelligent life out there?
- I hope so.
I mean, that's the hope,
but we don't have the scientific evidence for that now.
I think all the evidence we have in terms of life existing
is much more compelling, again,
'cause we have the building blocks of life now.
When that life turns into intelligence,
that's a big unknown.
- If we ever meet,
do you think we would be able to find a common language?
- I hope so.
We haven't met yet.
It's just so far.
I mean, do physics just play a role here?
Look at all these exoplanets, 6,000 exoplanets.
I mean, even the couple dozen Earth-like planets
that are exoplanets that really look like habitable planets.
These are very Earth-like.
They look like they have all the building blocks.
I can't wait to get there.
The only thing is they're 10 to 100 light years away.
So scientifically, we know they're there.
We know that they're habitable.
They have everything going for them, right?
In the Goldilocks zone, not too hot, not too cold,
just perfect for habitability for life.
But now the reality is if they're 10, at the best,
to 100, to thousands of light years away.
So what's out there?
But I just can't think that we're not the only ones.
So absolutely life, life in the universe,
probably intelligent life as well.
- Do you think there needs to be fundamental revolutions
in how we, the tools we use to travel through space
in order for us to venture outside of our solar system?
Or do you think the ways, the rockets,
the ideas we have now, the engineering ideas we have now
will be enough to venture out?
- Well, it's a good question.
Right now, 'cause again, speed of light is a limit.
We don't have warp speed, warp drive.
To explore our solar system, to get to Mars,
explore all the planets, then we need technology push,
but technology push here is just advanced propulsion.
It'd be great if I could get humans to Mars
in say three to four months, not eight months.
I mean, half the time, 50% reduction.
That's great in terms of safety and wellness of the crew.
Orbital mechanics, but physics rules.
Orbital mechanics is still there.
Physics rules, we can't defy physics.
- I love that.
- Invent a new physics.
I mean, look at quantum theories.
- Yeah, you never know.
- Exactly, I mean, we are always learning.
So we definitely don't know all the physics that exist too,
but we still have to, it's not science fiction.
We still have to pay attention to physics
in terms of our speed of travel for space flight.
- So you were the deputy administrator of NASA
during the Obama administration.
There's a current Artemis program
that's working on a crewed mission to the moon
and then perhaps to Mars.
What are you excited about there?
What are your thoughts on this program?
What are the biggest challenges do you think
of getting to the moon, of landing to the moon once again,
and then the big step to Mars?
- Well, I love the moon program now.
Artemis is definitely, we've been in low Earth orbit.
I love low Earth orbit too,
but I just always look at it as three phases.
So low Earth orbit where we've been 40 years,
so definitely time to get back to deep space,
time to get to the moon.
There's so much to do on the moon.
I hope we don't get stuck on the moon for 50 years.
I really want to get to the moon, spend the next decade
first with the lander, then humans.
There's just a lot to explore,
but to me it's a big technology push.
It's only three days away,
so the moon is definitely the right place.
So we kind of buy down our technology,
we invest in specifically habitats, life support systems.
We need suits, we really need to understand
really how to live off planet.
We've been off planet and low Earth orbit,
but still that's only 400 kilometers up, 250 miles, right?
So we get to the moon, it really is a great proving ground
for the technologies, and now we're in deep space,
radiation becomes a huge issue
to keep our astronauts well and alive.
And I look at all of that investment for moon exploration
to the ultimate goal, the horizon goals we call it,
to get people to Mars.
But we just don't go to Mars tomorrow, right?
We really need a decade on the moon, I think,
investing in the technologies, learning,
making sure the astronauts are, their health,
they're safe and well, and also learning so much
about in-situ research, utilization, ISRU,
in-situ resource utilization is huge
when it comes to exploration for the moon and Mars.
So we need a test bed, and to me,
it really is a lunar test bed.
And then we use those same investments
to think about getting people to Mars in the 2030s.
- So developing sort of a platform
of all the kind of research tools,
of all the, what's the resource utilization,
can you speak to that?
- Yeah, so ISRU for the moon, it's,
we'll go to the South Pole, and it's fascinating,
we have images of it, of course,
we know there's permanently shaded areas,
and like by Shackleton Crater,
and there's areas that are permanently in the sun.
Well, it seems that there's a lot of water, ice,
you know, water that's trapped in ice,
and the lunar craters, that's the first place you go.
Why?
Because it's water, and when you wanna try to,
it could be fuel, you know, life support systems,
so you kinda, again, you go where the water is.
And so when the moon is kind of for resources, utilization,
§03Transcript · 16:12–23:47
but to learn how to, can we make the fuels
out of the resources that are on the moon?
We have to think about 3D printing, right?
You don't get to bring all this mass with you.
You have to learn how to literally live off the land.
We need a pressure shell, we need to have an atmosphere
for people to live in.
So all of that is gonna bind down the technology,
doing the investigation, doing the science,
what are the, basically, we call them lunar volatiles,
you know, what is that ice on the moon,
how much of it is there, what do the resources look like?
To me, that helps us, that's just the next step
in getting humans to Mars.
- And it's cheaper and more effective
to sort of develop some of these difficult challenges,
like solve some of these challenges,
practice, develop, test, and so on on the moon.
- Absolutely. - That is on Mars.
- Absolutely, and people are gonna love to,
you know, you get to the moon, you get to,
you have a beautiful Earth rise,
I mean, you have the most magnificent view
of Earth being off planet, so it just makes sense.
I think we're gonna have thousands, lots of people,
hopefully tens of thousands in low-Earth orbit,
'cause low-Earth orbit is a beautiful place to go
and look down on the Earth, but people wanna return home,
think the lunar explorers will also wanna do
round trips and, you know, be on the moon,
three-day trip, explore, do science,
also because the lunar day is, you know,
14 days and lunar night's also 14 days,
so in that 28-day cycle, you know,
half of it is in light, half of it's in dark.
So people would probably wanna do, you know,
couple-week trips, month-long trips, not longer than that.
- What do you mean by people?
What do you-- - People, explorers.
I mean-- - Explorer?
- Yeah, astronauts are gonna be civilians in the future too,
not all astronauts are gonna be government,
astronauts, actually, when I was at NASA,
we changed, we actually got the law changed
to recognize astronauts that are not only
government employees, you know, NASA astronauts
or European Space Agency astronauts
or Russian Space Agency, that astronauts,
because of the big push we put in the private sector,
that astronauts, essentially, are gonna be astronauts
who get over 100 kilometers up,
and I think once you've done orbital flight,
then you're an astronaut, so a lot of private citizens
are gonna become astronauts.
- Do you think one day you might step foot on the moon?
- I think it'd be good to go to the moon,
I'd give that a shot.
Mars, I'm gonna, it's my life's work
to get the next generation to Mars,
that's you or even younger than you,
you know, my students' generation
will be the Martian explorers.
I'm just working to facilitate that,
but that's not gonna be me.
- Hey, the moon's pretty good, and it's a lot tough,
I mean, it's still a really tough mission.
- It's an extreme mission, exactly,
it's great for exploration, but doable,
but again, before Apollo, we didn't think
getting humans to the moon was even possible,
so we kind of made that possible,
but we need to go back, we absolutely need to go back,
we're investing in the heavy lift launch capabilities
that we need to get there, we haven't had that
since the Apollo days, since Saturn V,
so now we have three options on the board,
that's what's so fantastic,
NASA has its space launch system,
SpaceX is gonna have its heavy capability,
and Blue Origin is coming along too with heavy lift,
so that's pretty fantastic from where I sit,
I'm the Apollo program professor,
today I have zero heavy lift launch capability,
I can't wait, just in a few years,
we'll have three different heavy lift launch capabilities,
so that's pretty exciting.
- You know, your heart is perhaps with NASA,
but you mentioned SpaceX and Blue Origin,
what are your thoughts of SpaceX
and the innovative efforts there
from the sort of private company aspect?
- Oh, they're great, remember that the investments
in SpaceX is government funding,
it's NASA funding, it's US Air Force funding,
just as it should be, because they're betting on a company
who is moving fast, has some new technology development,
so I love it, so when I was at NASA,
it really was under our public-private partnerships,
so necessarily, the government needs to fund
these startups, now SpaceX is no longer a startup,
but it's been at it for 10 years,
it's had some accidents, learned a lot of lessons,
but it's great, because it's the way you move faster,
and also, some private industry folks
and private businesses will take a lot more risk,
that's also really important for the government.
- What do you think about that culture of risk?
I mean, sort of NASA and the government
are exceptionally good at delivering sort of safe,
like there's a little bit more of a culture
of caution and safety, and sort of this kind
of solid engineering, and I think SpaceX,
while it has the same kind of stuff,
it has a little bit more of that startup feel,
where they take the bigger risk.
Is that exciting for you to see,
seeing bigger risks in this kind of space?
- Absolutely, and the best scenario
is both of them working together,
because there's really important lessons learned,
especially when you talk about human spaceflight,
safety, quality assurance, these things
are the utmost importance, both aviation and space,
when human lives are at stake.
On the other hand, government agencies,
NASA can be a European space agency, you name it,
they become very bureaucratic, pretty risk-averse,
move pretty slowly, so I think the best
is when you combine the partnerships from both sides.
Industry necessarily has to push the government,
take some more risk, you know, like there's smart risk,
I actually gave an award at NASA for failing smart.
(laughing)
- Failing smart, I love that.
- Yeah, so you can kind of break open the culture,
say, no, look at Apollo, that was a huge risk,
it was done well, so there's always a culture
of safety, quality assurance, engineering, at its best,
but on the other hand, you wanna get things done,
and you have to also bring the cost down,
for when it comes to launch,
we really have to bring the cost down
and get the frequency up, and so that's
what the newcomers are doing, they're really pushing that,
so it's about the most exciting time
that I can imagine for spaceflight,
again, a little bit, it really is the democratization
of spaceflight, opening it up,
not just because the launch capability,
but the science we can do on a CubeSat,
what you can do now, those used to be student projects
that we would go through, conceive, design, implement,
and think about what a small satellite would be,
now, these are really advanced instruments,
science instruments that are flying
on little, teeny CubeSats that pretty much
anyone can afford, so there's not a,
there's every nation, every place in the world
can fly a CubeSat, and so that's--
- What's a CubeSat?
- Oh, CubeSat is a, this is called 1U,
CubeSats we measure in terms of units,
so just in terms of, I put both my hands together,
that's one unit, two units, three,
so little, small satellites, so CubeSats
are for small satellites, and we actually
go by mass as well, small satellite might be
100 kilos, 200 kilos, well under 1,000 kilos,
CubeSats then are the next thing down from small sats,
basically kilos, tens of kilos, things like that,
but kind of the building blocks,
CubeSats are fantastic design,
'cause it's kind of modular design,
so I can take a 1U, one unit of CubeSat,
and what if I have a little bit more money in payload,
I can fly three of 'em, and just basically
put a lot more instruments on it,
but essentially, think about something
the size of a shoebox, if you will,
that would be a CubeSat.
- And those, how do those help empower you
in terms of doing science, in terms of doing experiments?
- Oh, right now, there's, again,
back to private industry, Planet, the company,
is flying CubeSats, and literally looking down on Earth,
and orbiting Earth, taking a picture, if you will,
of Earth every day, every 24 hours,
covering the entire Earth, so in terms of Earth observations,
in terms of climate change, in terms of our changing Earth,
it's revolutionizing, because they're affordable,
we can put a whole bunch of 'em up,
the telecoms, we're all on our cell phones,
and we have GPS, we have our telecoms,
but those used to be very expensive satellites,
providing that service, now we can fly
a whole bunch of modular CubeSats,
so it really is a breakthrough,
in terms of modularity, as well as cost reduction.
- So, that's one exciting set of developments,
is there something else that you've been excited about,
§04Transcript · 23:51–31:03
like reusable rockets, perhaps,
that you've seen in the last few years?
- Yeah, well, the reusability,
you had, the reusability is awesome,
I mean, it's just the best, now we have to remember,
the shuttle was a reusable vehicle,
which, and the shuttle is an amazing,
it's an aerospace engineer, you know,
I mean, the shuttle is still just the most gorgeous,
elegant, extraordinary design of a space vehicle,
it was reusable, it just wasn't affordable,
but the reusability of it was really critical,
'cause we flew it up, it did come back,
so the notion of reusability, I think, absolutely,
now what we're doing with, we, you know,
the global we, but with SpaceX and Vorgent,
setting the rockets up, recovering the first stages,
where if they can regain 70% cost savings, that's huge,
and just seeing the control, you know,
the control and dynamics, just seeing that rocket
come back and land, it never gets old,
it's exciting every single time you look at it
and say, that's magic, so, it's so cool.
- To me, the landing is where I stand up,
start clapping, just the control, yeah.
- Yeah, just the algorithm, just the control algorithms,
and hitting that landing, it's, you know,
it's gymnastics for rocket shifts,
but to see these guys stick a landing,
it's just wonderful, so every time,
like I say, every time I see, you know,
the reusability and the rockets coming back
and landing so precisely, it's really exciting.
So it is, it is actually, that's a game changer,
we are in a new era of lower costs
and a lot, the higher frequency,
and it's the world, not just NASA,
it's many nations are really upping
their frequency of launches.
- So you've done a lot of exciting research,
design engineering on spacesuits.
What does the spacesuit of the future look like?
- Well, if I have anything to say about it,
it'll be a very, it'll be a very tight-fitting suit.
We use mechanical counterpressure
to pressurize right directly on the skin.
Seems that it's technically feasible.
We're still at the research and development stage,
we don't have a flight system,
but technically it's feasible,
so we do a lot of work in the materials,
you know, what materials do we need to pressurize someone?
What's the patterning we need?
That's what our patents are in, the patterning,
kind of how we apply this, it's a third of an atmosphere.
- Just to sort of take a little step back,
you have this incredible bio suit
where it's tight-fitting, so it allows more mobility
and so on, so maybe even to take a bigger step back,
like what are the functions that a spacesuit should perform?
- Sure, so start from the beginning.
A spacesuit is the world's smallest spacecraft,
so I really, that's the best definition I can give you.
Right now we fly gas-pressurized suits,
but think of developing and designing an entire spacecraft.
So then you take all those systems
and you shrink 'em around a person,
provide 'em with oxygen debris,
scrub out their carbon dioxide,
make sure they have pressure,
they need a pressure environment to live in.
So really the spacesuit is a shrunken spacecraft
in its entirety, has all the same systems.
- Communication as well, probably,
all that kind of stuff. - Yeah, communications,
exactly, so you really, thermal control,
little bit of radiation, not so much radiation protection,
but thermal control, humidity, oxygen debris,
so all those life support systems
as well as the pressure production.
So it's an engineering marvel,
the spacesuits that have flown,
because they really are entire spacecraft,
they're the smallest spacecraft that we have around a person,
but they're very massive,
but 140 kilos, the current suit,
and they're not mobility suits.
So since we're going back to the moon and Mars,
we need a planetary suit, we need a mobility suit.
So that's where we've kind of flipped the design paradigm.
I study astronauts, I study humans in motion,
and if we can map that motion,
I wanna give you full flexibility,
you know, move your arms and legs.
I really want you to be like an Olympic athlete,
an extreme explorer.
I don't wanna waste any of your energy,
so we take it from the human design.
So I take a look at humans, we measure them, we model them,
and then I say, okay, can I put a spacesuit on them
that goes from the skin out?
So rather than a gas pressurized shrinking
that spacecraft around the person,
say here's how humans perform,
can I design a spacesuit literally from the skin out?
And that's what we've come up with,
mechanical counterpressure, some patterning,
and that way it could be order of magnitude less
in terms of the mass,
and it should provide maximum mobility.
For a moon or a Mars.
- What's mechanical counterpressure?
Like how the heck can you even begin
to create something that's tight-fitting?
- So-- - And still doesn't
protect you from the elements and so on,
and the whole, the pressure thing?
- That's the challenge, it's a big design challenge,
we've been working on it for a while.
So you can either put someone in a balloon,
that's one way to do it, that's conventional,
that's the only thing we've ever thought.
- What's that mean, that means the balloon
that you fill with gas? - That's a gas pressurized suit.
So put someone in a balloon.
It's only a third of an atmosphere
to keep someone alive, so that's what the current system is,
so depending on what units you think,
and 30 kilopascals, 4.3 pounds per square inch.
- So much less than the pressure that's on Earth.
You can still keep a human alive with .3,
and it's alive and happy.
- Alive and happy, and you mix the gases.
Do you need, here, we're having this chat,
and we're at one sea level in Boston,
at one atmosphere, but a suit--
- Oxygen and nitrogen.
- Oxygen and nitrogen, and you put a suit,
if we put someone to a third of an atmosphere,
so for mechanical counterpressure now,
so one way is to do it with a balloon,
and that's what we currently have,
or you can apply the pressure directly to the skin.
I only have to give you a third of an atmosphere.
Right now, you and I are very happy in one atmosphere,
so if I put that pressure, a third of an atmosphere on you,
I just have to do it consistently
across all of your body and your limbs,
and it'll be a gas pressurized helmet.
Doesn't make sense to shrink wrap the head.
See the blue mangrove, that's a great act,
but we don't need to, there's no benefits
of shrink wrapping the head.
You put a gas pressurized helmet,
because the helmet then, the future of suits,
you asked me about, the helmet just becomes
your information portal.
So it will have augmented reality,
it'll have all the information you need.
Should have the maps that I need.
I'm on the moon, okay, well hey, smart helmet,
then show me the map, show me the topography.
Hopefully it has the lab embedded too.
If it has really great cameras,
maybe I can see with that regolith.
That's just lunar dust and dirt.
What's that made out of?
We talked about the water.
So the helmet then really becomes this information portal,
is how I see kind of the IT architecture,
the helmet is really allowing me to use
all of my modalities of an explorer that I'd like to.
So cameras, voiceover, images.
If it were really good, it would kind of be,
would have lab capabilities as well.
- Okay, so the pressure comes from the body,
comes from the mechanical pressure, which is fascinating.
Now what aspect, when I look at bio-suit,
just the suits you're working on,
sort of from a fashion perspective, they look awesome.
Is that a small part of it too?
- Oh, absolutely, 'cause the teams that we work with,
of course I'm an engineer, there's engineering students,
there's design students, there's architects.
So it really is a very much a multidisciplinary team.
So sure, colors, aesthetics, materials,
all those things we pay attention to.
So it's not just an engineering solution.
It really is a much more holistic, it's a suit.
It's a suit, you're dressed in a suit now.
It's a form fitting.
So we really have to pay attention to all those things.
And so that's the design team that we work with.
And my partner, Gaytroti, we're partners in this
in terms of he comes from an architecture,
industrial design background.
So bringing those skills to bear as well.
We team up with industry folks who are in
athletic performance and designers.
So it really is a team that brings
§05Transcript · 31:04–38:25
all those skills together.
- So what role does the space suit play
in our long-term staying in Mars?
Sort of exploring the, doing all the work
that astronauts do, but also perhaps civilians one day,
almost like taking steps towards colonization of Mars.
What role does a space suit play there?
- So you always need a life support system,
pressurized habitat, and I like to say,
we're not going to Mars to sit around.
So you need a suit.
Even if you land and have the lander,
you're not going there to stay inside.
That's for darn sure.
We're going there to search for the evidence of life.
That's why we're going to Mars.
So you need a lot of mobility.
So for me, the suit is the best way
to give the human mobility.
We're always still gonna need rovers.
We're gonna need robots.
So for me, exploration is always a suite of explorers.
Some people are gonna,
some of the suite of explorers are humans,
but many are gonna be robots, smart systems,
things like that.
But I look at it as kind of all those capabilities together
make the best exploration team.
- So let me ask, I love artificial intelligence,
and I've also saw that you've enjoyed the movie
Space Odyssey, 2001, a Space Odyssey.
Let me ask the question about how 9000,
that makes a few decisions there
that prioritizes the mission over the astronauts.
Do you think from a high philosophical question,
do you think Hal did the right thing
of prioritizing the mission?
- I think our artificial intelligence
will be smarter in the future.
For a Mars mission, it's a great question,
that is the reality of it.
For a Mars mission, we need fully autonomous systems.
We will get humans, but they have to be fully autonomous.
And that's a really important,
that's the most important concept
because there's not gonna be a mission control on Earth.
You know, 20 minute time lag,
there's just no way you're gonna control it.
So fully autonomous,
so people have to be fully autonomous as well,
but all of our systems as well.
And so that's the big design challenge.
So that's why we test them out on the moon as well.
When we have a, okay, a few second,
you know, a three second time lag, you can test them out.
We have to really get autonomous exploration down.
You asked me earlier about Magellan.
Magellan and his crew, they left, right?
They were autonomous.
You know, they were autonomous.
They left and they were on their own
to figure out that mission.
Then when they hit land, they have resources,
that's in-situ resource utilization
and everything else they brought with them.
So we have to, I think, have that mindset for exploration.
Again, back to the moon, it's more of the testing ground,
the proving ground with technologies.
But when we get to Mars, it's so far away
that we need fully autonomous systems.
So I think that's where, again, AI and autonomy come in,
a really robust autonomy,
things that we don't have today yet.
So they're on the drawing boards,
but we really need to test them out
'cause that's what we're up against.
- So fully autonomous, meaning self-sufficient,
there's still a role for the human in that picture.
Do you think there'll be a time when AI systems,
beyond doing fully autonomous flight control,
will also help or even take mission decisions like Hal did?
- That's interesting.
It depends.
I mean, they're gonna be designed by humans.
I think, as you mentioned, humans are always in the loop.
I mean, we might be on Earth, we might be in orbit on Mars,
maybe the systems, the landers down on the surface of Mars.
But I think we're gonna get, we are right now,
just on Earth-based systems, AI systems
that are incredibly capable and training them
with all the data that we have now,
petabytes of data from Earth.
What I care about for the autonomy and AI right now,
how we're applying it in research,
is to look at Earth and look at climate systems.
I mean, that's the, it's not for Mars to me today.
Right now, AI is to eyes on Earth,
all of our space data, compiling that, using supercomputers,
because we have so much information and knowledge
and we need to get that into people's hands.
We need, first there's the educational issue with climate
and our changing climate.
Then we need to change human behavior.
That's the biggie.
So this next decade, it's urgent we take care
of our own spaceship, which is Spaceship Earth.
So that's, to me, where my focus has been for AI systems,
using whatever's out there, kind of imagining also
what the future situation is,
what's the satellite imagery of Earth of the future.
If you can hold that in your hands,
that's gonna be really powerful.
Will that help people accelerate positive change for Earth
and for us to live in balance with Earth?
I hope so.
And kind of start with the ocean systems.
So oceans to land to air and kind of using
all the space data.
So it's a huge role for artificial intelligence
to help us analyze, I call it curating the data,
using the data.
It has a lot to do with visualizations as well.
- Do you think, and a weird, dark question,
do you think human species can survive
if we don't become interplanetary?
In the next century or a couple of centuries?
- Absolutely we can survive.
I don't think Mars is option B, actually.
So I think it's all about saving Spaceship Earth
and humanity.
I simply put, Earth doesn't need us,
but we really need Earth.
All of humanity needs to live in balance with Earth,
because Earth has been here a long time
before we ever showed up,
and it'll be here a long time after.
It's just a matter of how do we wanna live
with all living beings, much more in balance,
because we need to take care of the Earth,
and right now we're not.
So that's the urgency, and I think it is the next decade
to try to live much more sustainably,
live more in balance with Earth.
I think the human species has a great,
long, optimistic future, but we have to act.
It's urgent.
We have to change behavior.
We have to realize that we're all in this together.
It's just one blue bubble.
It's for humanity.
So when I think people realize that we're all astronauts,
that's the great news is everyone's gonna be an astronaut.
- Spaceship Earth.
- We're all astronauts on Spaceship Earth,
and this is our mission.
This is our mission to take care of the planet.
- And yet, as we explore out from our Spaceship Earth here,
out into space, what do you think the next 50, 100,
200 years look like for space exploration?
- I'm optimistic, so I think that we'll have lots of people,
thousands of people, tens of thousands of people,
who knows, maybe millions, in low-Earth orbit.
That's just a place that we're gonna have people,
and actually some industry, manufacturing, things like that.
That dream, I hope we realize, getting people to the moon,
so I can envision a lot of people on the moon.
Again, it's a great place to go.
- Living or visiting?
- Probably visiting and living, if you want to.
Most people are gonna wanna come back to Earth, I think,
but there'll be some people, and it's not such a long--
- Good view.
- It's a good view, it's a beautiful view.
So I think that we will have many people
on the moon as well.
I think there'll be some people, you told me,
wow, hundreds of years out.
So we'll have people, we'll be interplanetary, for sure,
as a species.
So I think we'll be on the moon, I think we'll be on Mars.
Venus, no, it's already a runaway greenhouse gas,
so not a great place for science.
Jupiter, all within the solar system,
great place for all of our scientific probes.
I don't see so much in terms of human physical presence.
We'll be exploring them.
So we live in our minds there,
because we're exploring them and going on those journeys.
But it's really our choice, in terms of our decisions,
of how in balance we're gonna be living here on the Earth.
- When do you think the first woman,
first person will step on Mars?
- Step on Mars?
Well, I'm gonna do everything I can
to make sure it happens in the 2030s.
- 2030s.
- Say mid-20, you know, 2025, 2035, we'll be on the moon.
And hopefully with more people than us.
But first with a few astronauts,
it'll be global, international folks.
§06Transcript · 38:27–39:25
But we really need those 10 years, I think, on the moon.
And then so by later in the decade, in the 2030s,
we'll have all the technology and know-how
and we need to get that human mission to Mars done.
- We'll live in exciting times.
And, Deva, thank you so much for leading the way.
And thank you for talking today.
I really appreciate it. - Thank you, my pleasure.
- Thanks for listening to this conversation.
And thank you to our presenting sponsor, Cash App.
Remember to use code LEXPODCAST
when you download Cash App
from the App Store or Google Play Store.
You'll get 10 bucks, $10, and $10 will go to FIRST,
a STEM education nonprofit
that inspires hundreds of thousands of young minds
to learn and to dream of engineering our future.
Thank you and hope to see you next time.
(upbeat music)
(upbeat music)
(upbeat music)
(upbeat music)
(upbeat music)
(upbeat music)