The arctic fox has the best insulating fur of all mammals.
There are more than 350 species of hummingbirds in the world.
Wheel spiders can tuck their legs in and roll at 3.3ft/s (1m/s). When they're up on a dune and threatened, they just roll down to safety.
It is scientifically accepted that birds have evolved from dinosaurs. The similarities between T-Rex and chickens have led scientists to believe that chickens are the descendants of T-Rex.
Chipmunks need to keep their fur clean. They take showers with wood and sand dust, the perfect chipmunk shampoo for oily hair.
The Bee Hummingbird (Mellisuga helenae) weighs approximately 1.8 grams, less than a U.S. penny. It is the smallest bird in the world, measuring just 2.2 inches long.
Snow leopards can use their tail as a blanket, wrapping it around their body to keep warm. It's a good thing to have in cold climates where temperatures may dip as low as -40°C (-40° F).
The southern elephant seal is the world largest seal. It can dive more than 3300 feet (1 km) while hunting for fish.
Ant eaters can eat up to 350,000 ants daily. They eat the ants without destroying the nest.
The Tennessee Aquarium is home to Electric Miguel, an electric eel with a Twitter account. He sends out tweets by generating high voltage electrical discharges.
The Ostrich lays the biggest eggs in the world. Their eggs can measure up to 6 inches in diameter, and weigh more than five pounds.
In most of Europe and United States a black cat crossing your path is considered a bad omen, while in Japan, Australia and UK it's considered good luck.
Indus river dolphins sleep in very short intervals, lasting at most one minute. Strong river currents require them to keep swimming, allowing little time for sleep.
Octopuses don't have tentacles, they have eight arms. Arms are more versatile than tentacles and can perform much finer movements.
The squirrel's tail has many uses; it can be used as blanket, a parachute, a way to balance and a way to communicate. By flicking their tail toward another animal they are saying "Go away!"
The warthog wild pig can live in the dry season for months without drinking any water.
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