Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Sound travels fifteen times faster through steel than through air.
134
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
German chemists made a replica of a trophy the size of one molecule.
68
Cold water weighs more than hot water.
93