Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Balsa wood is classified as a hard wood!
41
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Iron weighs more after it rusts.
68
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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38