Iron weighs more after it rusts.
68
Research indicates that plants grow healthier when they are stroked.
173
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17