Pumice is the only rock that floats on water.
14
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The average home creates more pollution than does the average car.
33
The only letter not appearing on the Periodic Table is the letter "J".
180
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
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Scientists are working on a portable spray-on-skin that can heal severe wounds in just a few minutes.The spray mainly contains important proteins that can reprogram the injured cells to become stem cells, and back to young uniformed skin cells. So far they were able to accelerate healing process from 12 weeks to 21 days with a similar approach.
16