The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The sun is 330,330 times larger than the earth.
75
Iron weighs more after it rusts.
68
Most dust particles in your house are made from dead skin!
67
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61