As humans, we like to think we invented intelligence, relying on education and experience to reinforce our confidence in what we know. But, wander through jungles, oceans, and skies, and you'll see ...

Researchers at Osaka Metropolitan University in Japan have discovered a previously undiscovered behavior in cleaner wrasse (Labroides dimidiatus ...

Learn how cleaner wrasse used a mirror and even dropped food to test their reflections, a behavior linked mostly to mammals.