Your brain is 80% water.
525
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
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
Aluminum used to be more valuable than gold!
84
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Iron weighs more after it rusts.
68
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18