Researchers used male replicas of bluefin killifish and controlled their movement with robotic arms to improve repeatability in experiments designed to determine how fertile female fish would respond ...

Dominant males of an Indonesian species of fish turn black during periods of heightened aggression, scientists have discovered. Their blackened markings, which quickly emerge at the start of a ...

When I stumble across Sam Abell’s photographs in our archives, I almost immediately know they are his, even if I can’t see the credit line. He has a distinctive style with strong composition and a ...