The simple question of "why five" has puzzled scientists from multiple fields, and the answer still isn't entirely clear.

Certain cat breeds are most commonly associated with polydactyly, although it can occur in various animals, including humans.

It should have just been a chill day at home, but the 8-year-old polydactyl orange cat was feeling feisty. She started ...

Mary Jo DiLonardo has worked in print, online, and broadcast journalism for 25 years and covers nature, health, science, and animals. Sloths spend their days in the treetops, barely moving.

But typically the consumption of plastic just leads to chronic, unrelenting hunger. Some animals now live in a world of plastics—like these hyenas scavenging at a landfill in Harar, Ethiopia.

Animals are disappearing at hundreds of times the normal rate, primarily because of shrinking habitats. Their biggest threat: humans. No trace of the wild South China tiger, Panthera tigris ...

Kathleen Grady rescued kitties Erin and Inis from a humane society in Broward, Fla. She picked them out separately, only to ...

You'll have a whale of a good time trying to solve these adorable animal riddles Learning becomes so much more enjoyable for kids when you make it fun. Taking something like riddles for kids and ...

Animal-assisted therapy, in which dogs, horses, and other domestic animals help facilitate different forms of therapy, can be helpful for individuals who are socially isolated, living with a ...

"And by the time totality had passed, things went back to normal, almost immediately!" Several animals at the Fort Worth Zoo made their way toward their barn doors, which is where they go at night ...

The study of animal behavior is a cornerstone of psychology for several reasons. Ethology, or the study of animals in their natural habitats, sheds light on how animals interact with each other ...