A finger-length fish has reignited a long-running debate about self-awareness, cognition and how much we’ve underestimated animal minds.

Awareness, especially self-awareness, is very difficult to study.  Self-awareness evolved among our animal ancestors and is ...

If you're not really into salt-water tanks or don't spend a lot of time in coral reefs, there's still a high probability you may have heard of the bluestreak cleaner wrasse fish. Likely because last ...

A little blue-and-black fish swims up to a mirror. It maneuvers its body vertically to reflect its belly, along with a brown mark that researchers have placed on its throat. The fish then pivots and ...

A study in the journal Neuron revealed something surprising about mouse intelligence — specifically, that they can recognize their own reflections. That may seem insignificant, but sociologists ...