Argon #atoms make up ~1% of our atmosphere and undergo almost no chemical reactions. They basically float around indefinitely. In 1967 Harlow Shapley noted that their permanence means we all literally share breath and have shared it with every human ever alive.
Argon-36 is the most common argon isotope in the universe. It’s often produced by stellar nucleosynthesis in #supernovas. In fact it was the first noble-gas #molecule detected in #space.
@markwyner How would you demonstrate this? Is there any way to follow the trajectory of Argon? Is it really that mobile that it could be found in another continent within one year? I would expect the mobility of single Argon atoms to be quite low.
It's a nice image, but I wouldn't be so sure that it's actually realistic.
