The human liver can regenerate itself fully. A liver that is only 30% the normal mass can regenerate to a full liver.
The average ant has about 250,000 brain cells; a human has about 10 billion. It takes 40,000 ants to equal the brain of a human.
Of all the thoughts you have throughout the day, 95% or more come from the subconscious mind.
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If you took the DNA strands out of all the cells in your body and stretched them out in a single line, they would circle the earth five million times.
The strongest of lightning bolts produce electromagnetic waves that can be detected anywhere on Earth. The waves can travel completely around the earth two to three times before dissipating.
The average snow flake falls at a speed of 3 to 4 miles per hour. It can take up to an hour to reach the ground.
Lightning bolts strike Earth about 8 million times every 24 hours. That's around 100 lighting strikes each second.
It takes 100,000 years for a space ship traveling at the speed of light to travel our galaxy (the Milky Way) from one end to the other.
The American space shuttle is the most complex machine ever built. It is made up of 2.5 million parts and it's engines produced 44 million horsepower on takeoff. The space shuttle program closed on July 21, 2011, after having brought 3 millions pounds of cargo into space.
Despite the popular myth, it's impossible to seriously injure somebody by dropping penny from an airplane or a tall building. The penny is not very aerodynamic and it doesn't have enough mass to cause damage (only about 3 grams). The worst it could do is cause a sting on the victim's head.
Lightning bolts on Earth may get as hot as 53,540 degrees Fahrenheit; that's more than four times hotter than the surface of the sun.
The speed of sound in water is about four times faster than in air. Since water is more dense than air, sound travels with greater ease.
Contrary to popular belief, we have more than five senses. We are able to feel heat from a distance, sense where our body parts are and maintain equilibrium when standing, we can sense when we are itchy, tense, and hungry.
Research has shown that frequently cracking your knuckles increases your chance of hand swelling and lowered grip strength.
Between 30,000 and 40,000 skin cells fall off you every minute as new cells grow and take their place. Your outer skin layer will be completely replaced by new cells in one to two months.
The smallest bone in the human body is found in the middle ear. It is called the staples bone, and it measures 2.8 millimeters long.
