Iron weighs more after it rusts.
68
Nearly 50% of the world's scientists are assigned to military projects.
71
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One ragweed plant can release as many as one billion grains of pollen!
51
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17