How many neurons does a fruit fly brain have?
139,255. That poppy-seed-sized brain also hid 54.5 million connections, the first whole-brain wiring map.
How close would your guess have been?
In the game we ask it like this: “How many neurons did scientists map in one adult fruit fly's brain?”
Type a number — scored exactly the way a round in the game is.
The answer
139,255



