Uploaded January 2026 | Updated September 2026, 2 weeks ago

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Stephen Wolfram hosts a live and unscripted Ask Me Anything about science and technology for all ages. Find the playlist of Q&A's here: https://wolfr.am/youtube-sw-qa

Originally livestreamed at: twitch.tv/stephen_wolfram

If you missed the original livestream of this episode, feel free to submit a question you would like Stephen to answer in a future Q&A livestream here: https://wolfr.am/12cczmv5J

00:00 Start stream
1:07 SW starts talking
2:25 Why are newer lightbulbs so much more efficient than older ones? They both turn electricity into light (energy)...
26:13 If humans saw in a completely different wavelength range, would our physics look different?
32:55 Why did humans never develop night vision?
46:33 ​​Why are infrared and ultraviolet on opposite poles when red is a component of violet?
54:07 ​cats have a sort of mirror in the back that redirects lost photons, that is why the eyes glow in the dark
55:34 Are we basically doing fourier transform in our brains to recognize colors?
58:12 What energetic levels are required to achieve a black body spectrum?
1:04:09 ​​Is there a way to train ai to assemble structures at the nanoscale so that light reflects off of the item as a whole and have it show visual effects realistically, like fire, gems, etc?
1:12:23 ​​Why is depth perception affected when you lose sight in one eye?
1:14:42 Why do optical illusions fool our brain?
1:18:31 End stream

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