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
Iron weighs more after it rusts.
68
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75