If the chemical sodium is dropped into water it will immediately and violently explode.
67
The sun is 330,330 times larger than the earth.
75
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Cold water weighs more than hot water.
93
The average home creates more pollution than does the average car.
33
Scientists are now able to grow 'beating' heart tissue in a lab!
162
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199