A type of light-sensitive cell in one of the visual systems of fruit flies transmits two chemical messengers, histamine and acetylcholine, in response to the same light signal. These two molecules act ...

One of the biggest mysteries of evolution is how species first developed complex vision. Jellyfish are helping scientists solve this puzzle, as the group has independently evolved eyes at least nine ...

Humans carry a surprising relic from deep evolutionary history, one that traces back to a tiny, one-eyed ancestor that lived nearly 600 million years ago. New findings on eye evolution highlight how ...