Fish play to have fun, according to a new study.
Some sharks are shy and others are vicious, according to researchers who discovered that the killer carnivore have personalities.
Some pooches are hardwired to be pessimistic, according to a new study on dogs.
The end of summer is a tragedy for students who dread going back to school. While depression is a common emotion in kids and young adults heading back to school, new research reveals that dogs also feel the "back to school blues".
Marine mammals "squeal" with delight when experiencing pleasure, according to a new study.
Penguins work in teams when hunting. New research reveals that little penguins synchronize their underwater movements during foraging trips.
Dogs are jealous creatures, according to a new study. Scientists found that dogs are more likely to push and snap their owners when they show affection to other canines compared to other objects.
Childhood experiences can shape the behavior of adult sheep, according to new research.
As crawfish season comes to an end, a collective sigh should be heard throughout the crustacean community. Like humans, these mini-lobsters experience emotion and get stressed and anxious.
Cat lovers are smarter than dog lovers. While people have forever disagreed whether cats or dogs make the best pets, new research reveals that cat owners are smarter than dog owners.
South American scientists have discovered three new tarantula species, according to a new study.
Crocodile tears are hard to come by, and new research reveals that butterflies and bees love the rare commodity.
Lovers beat fighters when it comes to attracting female horned beetles, according to a new study.
Ravens understand different types of social relationships like friendship, kinship and partnership.
Some females have penises. Scientists discovered Brazilian cave insects are actually sex-revered- meaning that females mate by inserting their "penis-like organs" into males' "vagina-like" openings.