In the new experiment, roosters made fewer alarm calls, meant to warn peers of predators, when placed in front a mirror versus when standing near another rooster. Stefano Spaziani / picture alliance ...

Funhouse mirrors help us learn about light and reflection. Mirrors are used for more than checking your face in the morning. Scientists have lots of uses for mirrors. Find out more about the different ...

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 ...