The bark of an older redwood tree is fireproof.
65
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The storage capacity of human brain exceeds 4 Terrabytes.
140
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Iron weighs more after it rusts.
16
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5