$200-$300/kg Cost Inflection
A decade-old study modeled the inflection point where space computing defeats standard terrestrial operational cost models.
Snapshot · All-In with Chamath, Jason, Sacks & Friedberg
The IPO Comeback: Why Tech Giants Are Finally Going Public | All-In Liquidity IPO Panel
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Jun 6, 2026
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Range anxiety is psychology, not physics
Rory Sutherland's EV showed 16% battery remaining (58 miles of range) causing panic, while his wife's smaller-battery Mini at 56% (also ~56 miles) felt completely fine — same physical range, radically different psychology.
Circadian clock integrates 2–3 days of light
The suprachiasmatic nucleus integrates photon exposure from the previous 2–3 days to set cortisol and melatonin timing — missing one morning is not catastrophic if you compensate the next day.
Olfactory neurons turn over throughout life
Unlike almost all other central nervous system neurons, olfactory neurons continuously regenerate throughout the lifespan and can be trained through deliberate, focused sniffing of distinct odors.
Chronotype: 20% are early birds
Only about 20% of people are genetically hardwired 'early birds'; the majority prefer waking between 6–8 AM and sleeping between 10 PM and midnight.
Point Nemo closer to ISS than land
Point Nemo in the Pacific Ocean — the farthest place from land on Earth — is closer to astronauts aboard the International Space Station than to any human on land.
1% gray matter loss in dads
Hands-on fathers lose approximately 1% of gray matter volume across the transition to fatherhood, mostly in the cortex — tied directly to parenting time and investment.
2.5% gray matter loss in moms
New mothers lose about 2.5% of gray matter volume, affecting both the cortex and subcortex including the amygdala and reward circuitry — a larger and more widespread change than in dads.
More kids = younger-looking brain
UK Biobank data shows that having more children (up to about 3) is associated with better cognitive functioning and machine-learning-assessed younger brain age in middle and older age.
Neuroprotective effect peaks at ~3 kids
The neuroprotective benefit of parenthood on brain age tops off at around 3 children, after which there is no additional cognitive benefit from having more.
