Green anaconda females are vicious mates, often cannibalizing males after mating. Read here to learn why they do this!

Spiders are one of the easiest groups of invertebrates to watch and they're fascinating creatures. Here are some of our ...

My friend and I had just stepped out of May’s Drive-In late one October morning when she pointed to a large black bird on the ...

Finding a partner and sticking with them for life isn’t all that common in the animal world, but a few species really commit.

One of the fundamental rules of inheritance states that different alleles (gene copies) of a trait, such as sex, are ...

There’s perhaps no more fascinating Bay Area day trip than hanging with the bellowing animals of Año Nuevo State Park.

Cassowaries are already known as one of the most dangerous birds on the planet—but mating season raises the stakes. This ...

Hai’s book “The Nazi and the Psychiatrist,” “Nuremberg” concentrates on the interactions between confident (Oscar winner Rami ...

Working animals, like therapy horses and military K9s, have irreplaceable jobs in their fields. In fact, they can become such beloved colleagues that, sometimes, that's all you can see! It can be easy ...

Few shark species have ever been caught mating on camera. So when marine biologist Hugo Lassauce stumbled upon a trio of Indo-Pacific leopard sharks copulating in quick succession, he knew he had the ...

If you want to exercise your heart, walk a dog. That’s one of the mottos of the Aspen Animal Shelter, whose nonprofit branch Friends of the Aspen Animal Shelter is the recipient of the inaugural Rubey ...