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.
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.
There are more than 350 species of hummingbirds in the world.
Ant eaters can eat up to 350,000 ants daily. They eat the ants without destroying the nest.
Chipmunks need to keep their fur clean. They take showers with wood and sand dust, the perfect chipmunk shampoo for oily hair.
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.
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.
The blue whale is the loudest animal on earth. A blue whale call can travel hundreds of miles across the water, and it is louder than an F18 jet fighter.
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.
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.
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.
The cheetah is the fastest of all land animals, being able to reach speeds of up to 68 mph (110km/h).
Octopuses don't have tentacles, they have eight arms. Arms are more versatile than tentacles and can perform much finer movements.
Elephants have the longest pregnancy of all mammals, 22 months long.
The tongue of an Anteater can grow longer than the size it's head.
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