In theory, a reaction to an out-of-place mark in a reflection is assumed to be evidence of self-recognition for other animals as well. Chimpanzees, elephants, and dolphins are just some that have ...

Learn how cleaner wrasse used a mirror and even dropped food to test their reflections, a behavior linked mostly to mammals.

In the current study, the scientists observed new behaviors during a series of mirror test experiments, a widely used method ...

A recent study reveals how tiny reef fish demonstrate advanced awareness by using mirrors to inspect marks placed on their bodies.