This year a study will come out confirming that scientist have found a strong indication of life on a exoplanet.
It has to do with a molecule that is a by-product of life. So there are the standard molecules which exist due to a variety of reasons, and there are molecules which are produced by life. The molecule that they found exists on earth due to plankton.
Im sure that I posted the initial reports a few months ago somewhere but I can’t find the post.