cross-posted from: https://lemmy.world/post/5090028
While the James Webb Space Telescope observed the atmosphere of an alien world 120 light-years away, it picked up hints of a substance only made by living things — at least, that is, on Earth.
This molecule, known as dimethyl sulfide, is primarily produced by phytoplankton, microscopic plant-like organisms in salty seas as well as freshwater.
tl;dr “only made by” is not the same as “primarily produced by.” The molecule in question is only made by living things on Earth.