Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Iron weighs more after it rusts.
68
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
A cubic yard of air weighs about 2 pounds at sea level.
31
A cesium atom in an atomic clock beats over nine billion times a second.
43