Cheng Lou

@_chenglou · Twitter · 2026-02-17 22:57 UTC

Average adult human brain is 1,300,000 mm³. If there are 150M synapses/mm³, we've got ~195,000,000,000,000 (195 trillion) synapses. If each synapses maps to a neural net weight* then that's a 200T model, at which point it'll start sounding truly human!

All day Astronomy

@forallcurious · Twitter · 2026-02-17 15:23 UTC

🚨: Scientists mapped 1 mm³ of a human brain ─ less than a grain of rice ─ and a microscopic cosmos appeared.