Pumice is the only rock that floats on water.
14
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Pure water (H2O) does not conduct electricity on its own.
46
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16