4.5 pounds of sunlight strike the Earth each day.
27
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
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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Sound travels about 4 times faster in water than in air.
408
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Cold water weighs more than hot water.
93