Before squaring up for a fight, some fish check themselves out in the mirror to make sure they're big enough. This strange behavior was seen in bluestreak cleaner wrasse (Labroides dimidiatus), who ...

Mirrors were better in the past. So said my father-in-law, who lived to be 93 years old. In his last years, he grew disenchanted with the reflection staring back at him each morning. Many people think ...

Wild baboons failed to demonstrate visual self-recognition in a test carried out by anthropologists. Published today in Proceedings of the Royal Society B, the study found that while the baboons ...