Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Diamonds can be shattered with a hammer.
-104
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The only letter not appearing on the Periodic Table is the letter "J".
180
For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
34
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17