Octopus, squid and cuttlefish — collectively known as cephalopods — have strange, massive, distributed brains. What do they do with all that neural power? Dive into the ocean with marine biologist Roger Hanlon, who shares astonishing footage of the camouflaging abilities of cephalopods, which can change their skin color and texture in a flash. Learn how their smart skin, and their ability to deploy it in sophisticated ways, could be evidence of an alternative form of intelligence — and how it could lead to breakthroughs in AI, fabrics, cosmetics and beyond.

Why does searching your symptoms online always leave you more frightened than before? As former chief medical officer of WebMD, physician John Whyte spent years believing more information meant better health — until he saw how too much of it was making people spiral. In a world of health influencers, algorithms and AI tools designed to keep you clicking, he reveals why clarity and context is a better prescription. (Recorded at TEDxNashville on October 19, 2025)

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What if the calm you feel when you hear birdsong isn’t a coincidence, but ancient evolutionary wiring … a signal that once meant safety? Musical ecologist and rapper Louis VI says humans are hardwired to nature’s sonic language, but modern life has drowned it out. He explores how we can tap back into the “overwhelming chorus of aliveness” we’ve stopped hearing — and performs “Butcherbird,” an original song syncing with the melody of bird calls from West Papua.