Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The sun is 330,330 times larger than the earth.
75
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57