A small coral reef fish can recognize itself in a mirror. This discovery challenges long-held ideas about animal intelligence.

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 ...

Cleaner wrasse have revealed a remarkable new side of fish intelligence. Marked with fake parasites, they used mirrors to inspect and remove the spots—far faster than seen in earlier tests. Even more ...

A shrimp scrap drifted down the face of a mirror, and a small reef fish tracked it like it was watching a slow-motion ...

Animals have surprised scientists with their intelligence for decades. From chimpanzees to dolphins, many species have shown they can recognize themselves. Now, a small fish called the cleaner wrasse, ...

Humans are well known for looking in the mirror and responding to their reflections. Interestingly, scientific research has revealed that it is a rare trait among animals, with only a few species ...

Awareness, especially self-awareness, is very difficult to study. Self-awareness evolved among our animal ancestors and is found in their descendants today. Its presence can be detected using the ...

Gorillas may have greater self-awareness than scientists previously thought. A new study finds that gorillas perform just as well as chimpanzees in tests that require awareness of their own bodies. A ...