Pumice is the only rock that floats on water.
14
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Sound travels about 4 times faster in water than in air.
408
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Diamonds can be shattered with a hammer.
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