It'll be tough to keep up with these fastest dog breeds in the world. It’s always nice to see dogs run with unbridled joy and wild abandon. After all, there’s rarely a time when they look happier.

Peregrine Falcon holds the title of the fastest bird and the fastest animal on Earth, with a speed exceeding 322 km/h (200 mph).

Speed is one of the most remarkable traits found in the animal kingdom, but identifying the fastest animal isn’t as simple as ...

It's not even the fastest mammal! Here are the fastest animals on Earth. Follow Tech Insider: On Facebook More from Science Cheetahs have a reputation for speed. While the big cats may be able to ...

The fastest dog breeds are naturally designed for speed. These are usually the ones bred for hunting or pursuit, particularly sighthounds. Heads held high, they sprint gracefully forward rather ...