Argon is also used in technical SCUBA diving to inflate the drysuit, due to its nonreactive, heat isolating effect. Argon as the gap between the panes of glass provides better insulation because it is a poorer conductor of heat than ordinary air. read more
Argon does the stirring while the oxygen removes carbon as carbon dioxide. It is also used when air must be excluded to prevent oxidation of hot metals, as in welding aluminium and the production of titanium to exclude air. read more
On Earth, the vast majority of argon is the isotope argon-40, which arises from the radioactive decay of potassium-40, according to Chemicool. But in space, argon is made in stars, when a two hydrogen nuclei, or alpha-particles, fuse with silicon-32. read more