In zero gravity, a candle's flame is round and blue.
16
The only letter not appearing on the Periodic Table is the letter "J".
180
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
A ball of glass will bounce higher than a ball made of rubber.
73
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15