The big buzz-ness of small brains

The big buzz-ness of small brains

Ever wondered what it takes to pack sophisticated behaviour into a brain the size of a pinhead? This episode of All In The Mind zooms right in on insect brains and what they can teach humans about intelligence, technology and perception. Host Natasha Mitchell chats with neuroethologists Professor Barbara Webb and Professor Eric Warrant, who study how tiny nervous systems handle big challenges.

As Webb points out, even a milligram-sized insect brain can support flying, seeing, walking and complex decision-making, all with up to a million neurons. That alone might make you think twice before reaching for the insect spray.

Webb shares how she builds robot crickets to test how well scientists really understand animal behaviour: "You haven't really understood something until you can build it and get it to work the same way." Her artificial crickets use microphones and neural network-style circuitry to mimic how real crickets follow mating calls or execute rapid escape moves, and she traces this work back to early light-seeking "tortoise" robots built with vacuum tubes.

Warrant shifts the focus to bees and deep-sea creatures, explaining how some nocturnal bees can see and even learn landmarks in conditions so dark that humans can't see their own hands. He describes slipping fake "white card" landmarks onto the wrong nest and watching confused bees repeatedly enter the decoy. From there, he goes into intricate detail on tiny eyes that squeeze useful information out of single photons, and how those tricks might improve low-light digital cameras.

Along the way, you’ll hear poetry, Monty Python references, and talk of giant squids with soccer-ball-sized eyes. It’s a playful yet densely packed conversation for anyone curious about brains, behaviour and how nature’s smallest creatures might inspire future robots and medical imaging. Who knew a chat about crickets, bees and squids could reset how you think about intelligence and complexity?