The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Iron weighs more after it rusts.
68
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Pure water (H2O) does not conduct electricity on its own.
46
Aluminum used to be more valuable than gold!
84