When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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Scientists are now able to grow 'beating' heart tissue in a lab!
162
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Cold water weighs more than hot water.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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A cubic yard of air weighs about 2 pounds at sea level.
31