Aravind Srinivas

The conversation picks up from a talk that started in the lobby. Rogan says he wanted Aravind Srinivas on the show after Srinivas described a weapon from ancient Hindu scripture that sounded like a nuclear bomb: the Brahmastra.

Srinivas places the Brahmastra in the Mahabharata. He calls it one of the two Hindu epics, alongside the Ramayana, and says he finds the Mahabharata the more interesting of the two. He describes the weapon as tightly restricted. To wield it, a warrior would have to be violating many things at a deeply moral level. Most warriors could not use it at all, and he estimates there were probably only two warriors in that era who were allowed to. The secret of using it had to be handed down from teacher to student.

think about it as like the equivalent of the nuclear code

He then tells the story of its lineage. Arjuna was allowed to use the weapon. Arjuna's teacher, Drona, had a son, Ashwatthama, who was always jealous of Arjuna. Arjuna was not Drona's son but his model disciple, and Drona passed the secret of the Brahmastra to him. The transcript breaks off at this point. When it resumes, someone has unleashed the Brahmastra and Lord Krishna has to come and save the planet from its destructive force.

Srinivas is open about not knowing how old the epic is. He says there are many opinions and gives his understanding as at least 1,500 years at the minimum and 2,500 years at the maximum, so the events would fall somewhere in that 1,000-year window. He begins to say it is still unclear how much of the story is literal, but the transcript cuts off mid-thought.

Srinivas describes the war at the centre of the epic as massive, with allies fighting on each side and many weapons described in great detail. A recurring feature is targeting. He says the Divyastra could be aimed at a particular person or group and would direct itself there, "almost like a semi-autonomous weapon." Lord Krishna's Sudarshan Chakra, which he describes as basically a discus, would find a specific person, cut off their head and return to its wielder.

He lists more astras, including the Divyastra, Varunastra and Nagastra, and calls the Brahmastra the ultimate one, the hydrogen bomb equivalent. He also says who had access to each is described in detail. He acknowledges that all of this is mythologized: the weapons are pictured as arrows carried behind the shoulder, which can be read more broadly as someone having access to a lot of weapons. He sums up the story as essentially a fight between a group of cousins, in which whoever was powerful went on to capture, colonize and gain power.

Military formations get the same detailed treatment. Srinivas mentions an army arranged like a lotus and the chakravyuha, a formation of concentric circles. An attacker cannot reach the innermost circle without passing through the outer ones, and can be killed by the flanks at each stage. He says the secret of breaking these formations (vyuhas) was known to only a few people.

Rogan offers a lost-civilization reading. If history is not a straight line from cavemen to the present, and civilizations have risen and fallen through disasters such as asteroid impacts or shifting of the poles, then these texts could be memories of an advanced civilization. He points to the pyramids of Giza as a sign that some technology was involved. He also concedes "we don't have evidence of the technology." His argument is conditional: if such a civilization were known to have existed, the Mahabharata would read as history.

They're just explaining it in a kind of crude contemporary way for the time

Rogan draws the modern parallel directly. Arrows stand in for semi-autonomous drones with explosive warheads, the Brahmastra for the hydrogen bomb, and he notes there are now autonomous fighter jets that don't need people. Srinivas agrees that the detail is what has always fascinated him about the epics: who had which level of access, what status that required, and how the weapons and formations were used in war.

Srinivas is more careful than Rogan. He says someone would need great skill to imagine a story in this much detail, and compares it to the detail Tolkien built into The Lord of the Rings. Still, he says, the way similar weapons have appeared in real life, "not exactly the same weapons, but similar style," makes him wonder whether something actually existed back then.

He then turns to the physical evidence, which cuts both ways. Excavations around Hastinapur, which he names as the kingdom at the centre of the story, have found some artifacts that might date back to those years. But some details in the epics do not match reality. The main warriors are described as very tall, seven or eight feet, though he says he doesn't know the exact numbers, while archaeologists' studies say people in those regions in that period were probably not more than six feet tall. He concludes that it is not clear what was correct and what was not, and that more probing is needed.

what could have existed in sacred text that was only partially communicated to the next generation and having a lot of like reinterpretations

Srinivas raises Vedic math as a second puzzle. He describes it as a branch of mathematics that some people in India grow up learning. He says he studied it himself, and that some people practice it to sharpen their mental math for exams like the GMAT and GRE. As he describes it, a line in the Vedas gives rules like "one from the last digit, two from the first digit." His example is 97 times 96: you work with the last two digits and put that result on the right, multiply the first digits and put that on the left, and the combined number is the answer.

What puzzles him is how a text as old as the Rig Veda could be describing computation. He calls this something that "feels very unreal" and asks whether people back then understood advanced forms of computation. The conversation does not look further into whether these methods actually come from the Vedic text.

Srinivas says he doesn't know exactly how old the Rig Veda is, so they look it up on Perplexity. The result confirms it is technically the oldest sacred text. As read aloud, it says scholars usually date its composition to about 1,500 to 1,200 B.C., which makes its oldest layers roughly 3,200 to 3,700 years old today. The figures are garbled in the transcript. Rogan asks how old the stories already were when they were written down, and how much was passed from person to person for years, as with the Bible.

Rogan notes that every ancient culture has a flood or apocalypse story. Srinivas says the Mahabharata has one too: a tsunami-like event that destroyed Lord Krishna's kingdom, Dwarka, after the war. He says the survivors were later wiped out by a calamity or by fighting among themselves, so most people of that era died. He says he doesn't know exactly what the event was called.

They pull up the Manu flood myth. In it, a divine fish warns the righteous king Manu of a coming deluge. He builds a boat and loads it with his family, seeds and animals, then ties it to the horn of the god in fish form, which tows the boat to safety until the waters recede and the world is repopulated. Rogan compares it to Noah's ark and says, "They all have the same story."

Srinivas explains the yugas as cycles thousands of years long that repeat. We are now in the Kali Yuga. Before it came the Dvapara Yuga, when most of the Mahabharata took place, and before that the Treta Yuga, the setting of the Ramayana, preceded by a first yuga whose name he can't remember. Nothing comes after the Kali Yuga; the cycle returns to the first one.

This leads to the segment's clearest disagreement. Rogan is reading David Steinmetz's book The Yugas, which holds that the Kali Yuga ended in the 1900s and the Dvapara Yuga began then. Srinivas rejects this outright.

No, no, we are in Kaliuga right now.

Rogan explains that the book follows one specific guru's interpretation. The book's description says that in 1894 an Indian sage gave an explanation of our hidden past, today's trends and future enlightenment. Srinivas suggests the gap may come from cycle length: the book treats the yuga cycle as 24,000 years, while he thinks it is probably much longer. He puts the four yugas together at about 4.32 million years (the transcript reads "four million three. 320,000 years"). Neither side settles it. Rogan says, "But I don't know who's right," and adds that it is hard to judge when interpretations come from one person or one guru and don't fully agree.

Rogan sets this alongside Sumerian and ancient Egyptian texts that describe kings before the flood ruling for thousands of years. He says these accounts recur across texts from different parts of Sumer. Historians accept the later, verifiable kings, yet the same texts list rulers who reigned for 6,000 years. He links the Egyptian version to Zep Tepi and recalls that Zahi Hawass denied its existence. His objection is that scholars accept figures like Khufu but dismiss the long-reigning kings, and he asks why so many cultures' stories line up on a pre-flood timeline. One speaker briefly notes that David Sinclair is working on life-extension drugs.

Srinivas connects the idea of civilizations being wiped out on Earth to the Fermi paradox, the question of where the aliens are. One answer is a great filter. He shares a theory he likes "just for the sake of entertainment": almost all civilizations advance a lot technologically and are then wiped out by a calamity or by a misaligned AGI they built, so they never become visible to us. The alternative is that we haven't yet built the von Neumann probes needed to find them. He calls both plausible and says there's no clear way to know unless we send out enough probes.

After a sponsor break, Rogan adds another possibility from the many he says exist: that aliens are observing without interfering while humanity moves through a cycle of cultural and civilizational evolution.

The segment returns to technology in the texts: the vimanas are described as "flying cars basically," and probably what we'll have 100 years from now. The stretch ends with a reversed thought experiment. If something happened to our civilization, while making clear they don't want that to happen, would people later believe today's achievements?

And would people really believe we were like launching reusable rockets? Right. Or making FaceTime calls to people in Australia?

This stretch of the conversation is speculation, and both speakers say so. Rogan admits there is no evidence of the technology he imagines. Srinivas notes that the epics are mythologized, that archaeology contradicts details like the warriors' height, and that more investigation is needed. He also offers his favorite Fermi-paradox theory only for entertainment. Several dates and figures are given as estimates or as things the speakers say they don't know exactly.

The excerpt opens with two possible explanations for why ancient achievements look so puzzling today. The first is lost knowledge. One speaker suggests that some ideas may have existed in the past, but the knowledge "was lost and it's not been documented, it's not been passed along," so people today doubt it ever existed. On this view, humanity ends up "reinventing it in different forms again and again" in a repeating cycle. The transcript has no speaker labels, so it is not always clear who is talking.

A second view follows straight away, framed as a possibility ("it also could be"). Here the pattern is simply "the natural progression of human curiosity," pushed along by the same pressures every time. Because humans are "territorial primates," they will always want to defeat their enemies and avoid being invaded. Technology then "goes down the same path": bullets, then nuclear bombs, then delivery by autonomous drone instead of a plane, and on to AI and life extension.

If we're always going to be territorial primates, we're always going to want to defeat our enemies.

The talk then moves to the pyramids. The speaker first admits there is "a lot of speculation as to the timeline," then assumes for argument's sake a construction date of 2,500 BC. The questions are practical: what tools were used, and how were stones brought "down from the mountains that were 500 miles away"? The same questions are asked about temples in India "carved entirely out of one piece of stone." Some of these were buried and later dug up. The speaker says "There's no timeline. No one really knows," and claims there is "no evidence of tools that were capable of doing this kind of work back then."

The temples are praised for their acoustics and geometry. One speaker goes further and claims the sites were chosen on purpose, to get "the right seismic vibrations" based on closeness to the ocean and "the gravitational waves from the sun and the moon." No evidence for this siting claim is given in the excerpt.

The core argument is that monolithic carving leaves no room for error: "You screw up one thing and it's over. There's no simulations." The speaker says the work is precise "within like millimeters from point to point." There is a caveat inside the same passage: "Look, it's possible. This is a possible endeavor. It can be done." The doubt is less about whether the work could be done and more about what technology would be needed to plan it that precisely.

The conversation then reads out what appears to be a looked-up explanation: the carvings were made with chisels and hammers plus careful geometric planning. The speaker rejects this. They point to three-dimensional sculptures with detailed carving reached through openings ("how'd you even reach in there?"). They also mention people who tried to replicate the work and found how little one person could do "in like 12 hours with a hammer." No source for that experiment is named.

It just says they use chisels and hammers and I don't think that's possible.

The same doubt is applied to Peru. The transcript renders the site as "Sox-I-Waman." There, stones "look like they're melted into place" and are described as "900 tons." The questions repeat: where the stones came from, how they were moved, and how they were aligned so well.

A claim that something was "Built in only 18 years" is then read out. The figure rests on attributing the work to one king, given in the transcript as "King Christian the first, 756 to 773 C.E." The transcript does not make clear which structure this refers to. The speakers question the dating ("How do you know, though?"). They set it against an archaeologists' estimate that the work would take 100 years. They conclude that historians' accounts are "all, like, muddled up," and one adds: "History is a real problem."

Srinivas, the guest, takes the theme of curiosity across the ages and turns it into his own idea, which he calls the "curiosity premium."

the most effective people, the most successful people, have always been the most curious people, the ones who have been good at asking the best questions.