Snapshot · Dwarkesh Podcast
General relativity predicts that gravity bends light passing the Sun at exactly double the amount predicted by Newtonian physics, confirmed by Eddington's 1919 eclipse expedition.
Where this was said
At 1:22:00 · chapter starts 1:18:51
The distant observer sees something strange: as the infaller approaches the event horizon, gravitational time dilation makes them appear to move slower and slower, their light redshifts from visible to infrared to radio, and eventually they just fade — the last photon arrives, and then silence. The observer never crosses, as seen from outside. But from the infaller's own perspective, their clock ticks normally, the horizon is unremarkable, and for a galactic-mass black hole the tidal forces at the horizon are too weak to feel [1] — Adam Brown "From outside, you never see someone cross the event horizon — they slow, redshift, and fade. From inside, the infaller notices nothing unus…" 1:13:03 . Brown emphasises that the event horizon is 'teleological' — it is not a locally measurable feature but a fact about your future. For a large enough black hole you could have descendants born inside the event horizon, live out a normal life, and only die at the singularity.
Two eclipse expeditions failed before 1919 — Argentina got clouded out, and a German team was arrested when WWI broke out. That was lucky: Einstein's pre-GR prediction was wrong, predicting only the Newtonian bending. He corrected it to double the Newtonian value during the quiet of the war, just in time for Eddington's successful 1919 expedition.
Sir Arthur Eddington's 1919 British eclipse expedition confirmed Einstein's corrected light-bending prediction, launching Einstein as a global celebrity and making GR the consensus view.
The widely cited ego-depletion model — the idea that willpower is a finite resource that gets depleted — failed to replicate in follow-up studies.
Humans are estimated to have 5,000–7,000 thoughts per day, yet can recall essentially none of them afterward, highlighting why in-the-moment emotional tracking matters.
A large Harvard study found that a wandering mind is an unhappy mind — people report greater happiness when their attention is tethered to the present, even if the task is unpleasant.
A key study finding that we have a 'credit card's worth of plastic' in our bodies was likely skewed because researchers used nitrile gloves that shed plastic particles onto the microplastic detector.
Emotionally sensitive people have a hyperactive amygdala, an underactive prefrontal cortex, and a frayed connection between the two — making emotional regulation structurally harder.
Rejection sensitivity can be observed as early as age 2 or 3, suggesting it has strong developmental and likely genetic roots.
A Yale study found that non-judgmental observation of emotions — without rushing to resolve them — reduces activation in the brain, making it a powerful regulation tool.
Dan Gilbert's research found that the psychological immune system — the brain's ability to justify and find satisfaction in choices — activates most powerfully when a decision is perceived as irreversible.
Barry Schwartz's research found that maximizers — people who try to optimize every decision — tend to achieve objectively better outcomes but report lower happiness than satisficers who choose 'good enough.'
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