At their smallest, Chihuahuas can weigh as little as 4 pounds and be as short as 6 inches!

Corgi means dwarf dog in Welsh.

Kublai Khan kept a kennel of 5,000 Mastiffs used for hunting and as dogs of war.

In Cormorant, Minnesota, Duke the dog is mayor! He was sworn in on August 16, 2014, after the majority of the town's 12 voters backed him in the balloting.

Puppies have 28 teeth, while adult dogs have 42.

Newfoundland dogs have webbed feet. They also have a water resistant coat!

Although the hearing ability of a dog is dependent on breed and age, studies have shown that most dogs can hear roughly 4 times as far as a human, meaning a human can hear at 20 feet what a dog can hear at 80 feet.

Dogs possess up to 300 million olfactory receptors in their noses, compared to about six million for humans. And the percentage of a dog's brain that is devoted to analyzing smells is about 40 times greater than ours. As a result, a dog's sense of smell is roughly 10,000 times keener than a human's!

Most of a dog's sweat glands are located around its foot pads, which is why they have to pant to keep themselves cool!

Three dogs (all from First Class cabins) survived the sinking of the Titanic -- two Pomeranians and one Pekingese. Apparently, it pays to be a lap dog!