Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Pumice is the only rock that floats on water.
14
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Aluminum used to be more valuable than gold!
84
Iron weighs more after it rusts.
68
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12