The common goldfish is the only animal that can see both infra-red and ultra-violet light.
It's impossible to sneeze with your eyes open.
The pupil of an octopus' eye is rectangular.
Our eyes are always the same size from birth, but our nose and ears never stop growing.
The leg bones of a bat are so thin that no bat can walk.
Ants cannot chew their food, they move their jaws sideways, like scissors, to extract the juices from the food.
Hummingbirds are the only animals able to fly backwards.
Tigers have striped skin, not just striped fur.
Armadillos get an average of 18.5 hours of sleep per day.
There are more beetles than any other kind of creature in the world.
Certain frogs that can survive the experience of being frozen.
Everyone's tongue print is different.
As an adult, you have more than 20 square feet of skin on your body--about the same square footage as a blanket for a queen-sized bed.
In your lifetime, you'll shed over 40 pounds of skin.
15 million blood cells are produced and destroyed in the human body every second.
Every minute, 30-40,000 dead skin cells fall from your body.
The brain uses more than 25% of the oxygen used by the human body.
If your mouth was completely dry, you would not be able to distinguish the taste of anything.
There are more living organisms on the skin of a single human being than there are human beings on the surface of the earth.
Muscles are made up of bundles from about 5 in the eyelid to about 200 in the buttock muscle.
Muscles in the human body (640 in total) make up about half of the body weight.
The human body has enough fat to produce 7 bars of soap.
The human head is a quarter of our total length at birth, but only an eighth of our total length by the time we reach adulthood.
Most people blink about 17,000 times a day.
A starfish can turn its stomach inside out.
A zebra is white with black stripes.
The animal with the largest brain in relation to its body is the ant.
The largest eggs in the world are laid by a shark.
A crocodiles tongue is attached to the roof of its mouth.
Crocodiles swallow stones to help them dive deeper.
Despite the hump, a camels spine is straight.
Cheetah's can accelerate from 0 to 70 km/h in 3 seconds.
A giraffe's neck contains the same number of vertebrae as a human.
The heart of giraffe is two feet long, and can weigh as much as twenty four pounds.
On average, elephants sleep for about 2 hours per day.
Shark's teeth are literally as hard as steel.
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
Seventy percent of the dust in your home consists of shed human skin.
Fish are the only vertebrates that outnumber birds.
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