The mirror test focuses on visual cues; however, there is no reason to think that other animals only use vision to make some assessments of self. The results of studies of self-recognition are a mixed ...

Humans like to study themselves in a mirror. But wild baboons, when presented with a mirror, don’t seem to recognize they’re staring at their own selves, a new study has found. For decades, ...

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 ...