From: HowStuffWorks on Fri, Dec 18 2009 2:31 AM

From: HowStuffWorks on Tue, Sep 29 2009 5:49 PM

The Newfoundland is the most extreme waterdog on the planet. Learn more about the Newfoundland breed in this clip from Animal Planet’s "Dogs 101" series.

From: HowStuffWorks on Tue, Sep 29 2009 5:47 PM

Collies were made popular in the United States by "Lassie" and other celebrity pets. See what makes them such wonderful companions in this clip from Animal Planet’s "Dogs 101" series.

From: HowStuffWorks on Tue, Sep 29 2009 5:47 PM

Meet the Apollo of the dog world. This breed is the tallest in the world and also one of the most gentle. Learn more about Great Danes in this clip from Animal Planet’s "Dogs 101" series.

From: HowStuffWorks on Tue, Sep 29 2009 5:47 PM

Chihuahuas are the smallest breed in the world and love to be pampered.

From: HowStuffWorks on Tue, Sep 29 2009 5:46 PM

The Queen of England’s favorite pooch can really bust a move. Learn more about the Pembroke Welsh Corgi in this clip from Animal Planet's "Dogs 101" series.

From: HowStuffWorks on Tue, Sep 29 2009 5:30 PM

While all dogs belong to the same species, each breed of dog has its own traits and personality. On Discovery Channel’s "A Dog's Life," learn how humans have bred 450 varieties of dogs.