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Live Streamed on May 21, 2025 2:35 PM ET
Occam’s Sledgehammer: The 277th Evolutionary Lens with Bret Weinstein and Heather Heying

It’s Prostate Week in Podcastistan: what happens when an MRI scan for prostatitis includes the injection of rare earth metals—should you, or shouldn’t you? Gadolinium crosses the blood-brain barrier if the barrier is not fully intact—does that affect your decision? Then: a letter from an MD-PhD student at Harvard prompts musings on the federal funding of science, what science is for, how complicit universities and many scientists have been for years, and what to do. Also: uterine transplants for “trans women.”


Our sponsors:

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Mentioned in this episode:

Gadolinium Contrast Dye: https://www.fda.gov/drugs/drug-safety-and-availability/fda-drug-safety-communication-fda-warns-gadolinium-based-contrast-agents-gbcas-are-retained-body

Letter from Harvard: https://naturalselections.substack.com/p/letter-from-harvard/comments

Higher Education Research & Development Survey: https://ncses.nsf.gov/surveys/higher-education-research-development/2023#data

Jones et al 2018. Uterine transplantation in transgender women. Bjog 126(2): 152-156: https://pmc.ncbi.nlm.nih.gov/articles/PMC6492192/pdf/BJO-126-152.pdf


Timestamps:
00:05:55 Welcome
00:10:37 Sponsors: Timeline, Caraway, and ARMRA Colostrum
00:19:42 Prostates in the News
00:22:45 Prostatitis
00:28:43 MRIs & Gadelinium
00:49:19 Letter from Harvard
01:29:39 Uterine transplantation in transgender women
01:40:05 WHO, Lab Leak, and mRNA
01:46:42 Closing

01:48:48
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Bret Weinstein and Heather Heying discuss censorship and the war in Iran:

We have "cartesian blinders being put on us so that we are trying to make sense out of scraps of information and hints." - @bretweinstein

00:02:06
Who exactly belongs in the Stone Ages?

WEINSTEIN: I mean, even if you have your villains who are engaged in the behavior that motivated this war in Iran, even if that's the story, presumably most of the people in the path of these ferocious bombings that he is describing are not deserving of going back to the Stone Age.

In fact, I distinctly remember him telling us that part of what we were up to was liberating the people of Iran from their tyrannical regime.

So if it's the tyrannical regime that justifies the ferocious bombing, then it's a tragedy that other people are going to be sent back to the Stone Ages with them. Right?

HEYING: It's it's not a narrative. It's an incoherent set of talking points.

WEINSTEIN: Yeah, it's a kind of cheerleading that is completely inappropriate from the perspective of the president.

Bret Weinstein discusses the Trump administrations "back to the stone age" recent remarks in the latest episode of The Evolutionary Lens, Episode 320 "Are we back in the stone age?" on DarkHorse.

00:00:58
Washington's 9.9% "Millionaires Tax" Isn't That Simple

Bret Weinstein explains, "If you stop businesses from starting here, and if you drive people so that they move elsewhere—even though it's difficult to do—then the point is the tax base dries up, which then forces you to become even more predatory for the people who stayed.

And that's really the thing, right? They're setting themselves up so that they have to go after more and more people, because the people who are starting new businesses are not going to do it here."

00:14:03
NEW on Bret Weinstein’s DarkHorse Podcast Inside Rail, "The Drone Hypothesis" featuring John Cullen.
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Add Episode 344 of The Evolutionary Lens with Dr. Bret Weinstein and Dr. Heather Heying, “Lions, New Tigers, and Bears, oh my” to your podcast playlist:

Bret and Heather discuss new cats, fat bears, and overwhelmed frogs. The tilcayo, a newly named species of cat from Bolivia, is part of a group of New World “tiger cats” that live on the outskirts of the Amazon basin. We discuss Carnivoran relationships, cats more specifically, and what is known about the history and ecology of the tilcayo in particular.

Then: it’s fat bear week at Katmai National Park in Alaska, where grizzlies are fattening themselves on salmon for the Winter ahead; we discuss hibernation, reproductive diapause, and general chonkiness in bears.

Finally: female Cope’s gray treefrogs have a harder time choosing good mates when there’s a lot of noise, and when there are too many suitors—kind of like how women often make bad choices when confronted with chaos and wingmen.

Locals: https://darkhorse.locals.com/post/8219193/the-344th-evolutionary-lens-with-bret-weinstein-and-heather-heying

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September 23, 2026

This should be cross posted here... so Here :)

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