A cubic yard of air weighs about 2 pounds at sea level.
31
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
The average temperature at 40,000 feet above sea level is -60 F.
56
A ball of glass will bounce higher than a ball made of rubber.
73
Hot water can freeze faster than cold water.
181
In zero gravity, a candle's flame is round and blue.
16
The bark of an older redwood tree is fireproof.
65
Research indicates that plants grow healthier when they are stroked.
173