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Fossil fuel
Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes ... > more -
Instrumental temperature record
The instrumental temperature record shows the fluctuations of the temperature of the atmosphere and the oceans since the invention of ... > more -
Soap bubble
A soap bubble is a very thin film of soap water that forms a hollow sphere with an iridescent surface. Soap bubbles usually last for only a few moments and then burst either on their own or on ... > more -
Cholesterol
Cholesterol is a sterol and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. Cholesterol plays a central role in many biochemical ... > more
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