Sound travels about 4 times faster in water than in air.
408
Research indicates that plants grow healthier when they are stroked.
173
In zero gravity, a candle's flame is round and blue.
16
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The force of a suction cup is calculated using F=AP.
15
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20