Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One barrel of petroleum holds 42 gallons.
20
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
The storage capacity of human brain exceeds 4 Terrabytes.
140
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57