Fossils Life processes can change the composition of the atmosphere. Fossils can tell scientists what living things were around at different times in Earth’s history. Evidence of early plants ...

Oxygen in the atmosphere is essential for all living things to stay alive, and for the combustion (burning) of fuels. They are all gases. Three of them are found in the Earth’s atmosphere in ...

Ranging from September 2004 to December 2023, it spans multiple levels of the atmosphere from ground level up to the lower edge of space, about 110 kilometers above Earth's surface. The region ...