A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sound travels fifteen times faster through steel than through air.
134
No matter how cold it gets, gasoline will not freeze.
107
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
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