The first animals must also have invented ways to produce the many different kinds of cells we have today; muscle cells, ...

Tiny, but feisty, chihuahuas are super energetic. Known as "purse dogs," they're between five and eight inches tall and weigh ...

Understanding your dog's age, activity level, and whether it has been spayed or neutered helps you determine its daily ...

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Your heart is with you for every moment of your life—but the way you care for it shouldn’t look the same at 25 as it does at 65. Cardiovascular disease is the leading cause of death in the U.S., and ...

Aptly called the “King of Terriers,” the first terrier on the list is also the largest: the Airedale Terrier. These ...

When you have a Toy Poodle or a Miniature Poodle and Yorkshire Terrier parents, you’re bound to be a zippy, excitable, social little angel who loves playtime but can turn on the charm, too. The site ...