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
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Your brain is 80% water.
525
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
One cubic foot of gold weighs more than 1,200 pounds!
78
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
If the chemical sodium is dropped into water it will immediately and violently explode.
67
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199