In zero gravity, a candle's flame is round and blue.
16
Hot water can freeze faster than cold water.
181
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One third of the electricity produced on earth is used to power electric light bulbs!
75
Out of all the senses, smell is most closely linked to memory.
146
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44