The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Your brain is 80% water.
525
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The bark of an older redwood tree is fireproof.
65
Iron weighs more after it rusts.
68
A single speck of dust is half way in size between a subatomic particle and the Earth.
15