Biosignatures

How soon we find a living exoplanet really depends on whether there's one relatively nearby, with the right orbit and size, and with biosignatures that we are able to recognize, Hu said. In other words, "There's always a factor of luck."

Lynch is an astrobiologist and geomicrobiologist studying life in extreme environments on Earth as models for characterizing habitable environments and searching for biosignatures on other planetary bodies in our solar system and elsewhere.

I read the article "Exoplanet Biosignatures: Observational Prospects."

If you like astrobiology, maybe read the paper "Exoplanet Biosignatures: Future Directions."