The earth is approx. 6,588,000,000,000,000,000 tons.
175
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
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The bark of an older redwood tree is fireproof.
65
Sound travels fifteen times faster through steel than through air.
134
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65