All pet hamsters are descended from a single female wild golden
hamster found with a litter of 12 young in Syria in 1930.
An adult lion's roar can be heard up to five miles away, and warns
off intruders or reunites scattered members of the pride.
Beaver teeth are so sharp that Native Americans once used them as
Camels have three eyelids to protect themselves from blowing sand.
Catnip can affect lions and tigers as well as house cats. It
excites them because it contains a chemical that resembles an
excretion of the dominant female's urine.
Cheetahs make a chirping sound that is much like a bird's chirp or
a dog's yelp. The sound is so an intense, it can be heard a mile away.
Despite its reputation for being finicky, the average cat consumes
about 127,750 calories a year, nearly 28 times its own weight in food
and the same amount again in liquids. In case you were wondering, cats
cannot survive on a vegetarian diet.
Developed in Egypt about 5,000 years ago, the greyhound breed was
known before the ninth century in England, where it was bred by
aristocrats to hunt such small game as hares.
Dolphins sleep at night just below the surface of the water. They
frequently rise to the surface for air.
During World War II, the very first bomb dropped on Berlin by the
Allies killed the only elephant in the Berlin Zoo.
Elephant tusks grow throughout an elephant's life and can weigh
more than 200 pounds. Among Asian elephants, only the males have
tusks. Both sexes of African elephants have tusks.