The only letter not appearing on the Periodic Table is the letter "J".
180
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One cubic foot of gold weighs more than 1,200 pounds!
78
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Pumice is the only rock that floats on water.
14
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199