Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
Iron weighs more after it rusts.
68
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
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24