Podbit · Stuff You Should Know
Blood is never blue — not even when deoxygenated. Veins appear blue because blue light can't penetrate as deeply as red light, so it reflects back to the surface. Red light goes deeper and gets absorbed, making deep tissue appear blue to the eye.
Shane read about yawning and immediately yawned, then went down a rabbit hole. Scientists point to mirror neurons and social bonding, but the real answer is nobody knows — and the Wikipedia page for yawning has an excellent koala photo.
The adult brain does not meaningfully grow new neurons — but it constantly rewires existing ones. Neuroplasticity is the brain's core survival mechanism, and conflating it with neurogenesis has misled people into thinking the adult brain can't change.
You can't randomize people to breathe dirty air for 20 years. That forces researchers into observational studies where hazard ratios for pollution hover around 1.3 — far too small for epidemiology to establish causality. Smoking gave us hazard ratios above 10; pollution rarely comes close.
The word 'pollution' lumps smog, urban light affecting birds, and cell tower radiation into one bucket — making it nearly impossible to separate signal from noise. Exposures are invisible, accumulate slowly, and take years to produce health effects, which compounds the public confusion.
Subcritical reactors operate permanently below the criticality threshold, meaning the reaction physically cannot run away. A particle accelerator provides the extra neutrons — and when you turn the accelerator off, the power stops completely. It solves the fundamental guarantee problem that has blocked nuclear regulation for 40 years.
Transplant a tumour cell nucleus into a healthy enucleated cell: no cancer. Transplant a healthy nucleus into a tumour cell's cytoplasm: cancer. The cancer lives in the cytoplasm — in the mitochondria — not the DNA. This experiment should have rewritten oncology. It hasn't.
Survivor's guilt isn't irrational — it's an evolved social signal. Showing distress rather than indifference after outliving your group members proves you weren't selfish. The tears aren't just grief; they're a proof-of-loyalty broadcast to the tribe that says 'I didn't just swim out the back of the bus myself.'
Flooding your most important sensory organ to signal pain is so costly — you can't fight, see, or defend yourself — that it functions as an unfakeable honesty signal. And emotional tears are biochemically different from other tears: higher in stress hormones, pain-relieving peptides, and proteins that crystallize into unique microscopic patterns.
Vance has effectively unlimited access to classified UFO files as VP but hasn't had time to investigate. He floated a theological theory: a malicious, super-powerful, human-like extraterrestrial being that tortures humans is functionally indistinguishable from a demon, drawing on millennia of cross-cultural religious precedent. He promises to investigate within 2.5 years.
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