According to studies, men change their minds two to three times more often than women.
72
Pumice is the only rock that floats on water.
14
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
The force of a suction cup is calculated using F=AP.
15
Sound travels about 4 times faster in water than in air.
408