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Welcome to this audio long read from nature. In this episode, Inside the Mind of an Animal,

written by Alison Abbott and read by me, Benjamin Thompson. Two years ago, Jennifer Lee and

Drew Robson were trawling through terabytes of data from a zebrafish brain experiment

when they came across a handful of cells that seemed to be psychic.

The two neuroscientists had planned to map brain activity while zebrafish larvae were hunting for food

and to see how the neural chatter changed. It was their first major test of a

technological platform they had built at Harvard University in Cambridge, Massachusetts. The platform

allowed them to view every cell in the larvae's brains, while the creatures, barely the size of an

eyelash, swam freely in a 35-millimetermm diameter dish of water snacking on their microscopic prey.

Out of the scientists' mountain of data emerged a handful of neurons that predicted when a larva was going to catch and swallow a morsel.

Some of these neurons even became activated many seconds before the larva fixed its eyes on the prey.

Something else was strange. Looking in more detail at the data, the researchers realized that

the psychic cells were active for an unusually long time, not seconds, as is typical for most neurons,

but many minutes. In fact, more or less the

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