Learn how cleaner wrasse used a mirror and even dropped food to test their reflections, a behavior linked mostly to mammals. A small reef fish may be doing something scientists once thought was ...

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 ...

Have you ever thought about experimenting with not looking in mirrors? If the idea sounds familiar, it's likely because in 2011, New York blogger Autumn Whitefield-Madrano wrote about her no-mirrors ...