Twenty percent of Earth's oxygen is produced by the Amazon forest. Submitted by: Jassim - | The noble gas Xenon lasers can cut through materials that are so tough even diamond tipped blades will not cut.
Submitted by: Josh Davies - Llanelli, Wales
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Gold and Copper are the only two non-white metals. | The burning sensation we get from chilli peppers is because of a chemical called Capsaicin. Submitted by: Cam - England. |
The lighter was invented before the match (in 1816 by J.W. Dobereiner). Submitted by: Leah Hopson - Denver, United States |  Each time lightning strikes, some Ozone gas is produced, thus strengthening the Ozone Layer in the Earth's atmosphere. |
Honey does not spoil. Submitted by: Ashalaya - Racine, Wisconsin, United States |  There's enough gold in the Earth's crust to cover the entire land surface knee-deep. |
An average adult body contains around 250g (1/2lb) of salt. | The metal with the highest melting point is tungsten, at 3410 degrees Celcius (6170F). |
One inch (2.5cm) of rain is equal to 10 inches (25cm) of snow. |  Mosquitoes like the scent of estrogen, hence, women get bitten by mosquitoes more often than men do. |
An ounce of gold can be stretched into a wire 80 kms (50 miles) long. | Natural gas has no odour. The smell is added artificially so that leaks can be detected. |
Air becomes liquid at about minus 190 degrees Celsius. | Mercury is the only metal that is liquid at room temperature. |
Absolutely pure gold is so soft that it can be moulded with the hands. | Water expands by about 10% as it freezes. |
It is estimated that a plastic container can resist decomposition for as long as 50,000 years. | If you slowly pour a handful of salt into a totally full glass of water it will not overflow. In fact, the water level will go down. |
Hydrogen gas is the least dense substance. | Liquid air looks like water with a bluish tint. |
Hydrogen is the most abundant element in the Universe (75%). | Oxygen is the most abundant element in the Earth's crust, waters, and atmosphere (about 49.5%) |
The only letter not appearing on the Periodic Table is the letter J. | Hydrofluoric acid will dissolve glass. |
A bee sting is acidic and a wasp sting is alkali. To treat a sting by one of these you should use the opposite type of chemical. | The amount of carbon in the human body is enough to fill about 9,000 'lead' pencils. |
