For every gallon of sea water, you get more than a quarter pound of salt.
45
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Research indicates that plants grow healthier when they are stroked.
173
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
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