Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Iron weighs more after it rusts.
68
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The bark of an older redwood tree is fireproof.
65
Sound at the right vibration can bore holes through a solid object.
134
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13