The best bet right now for what we call a biomarker is ozone and oxygen because if there's no life replenishing these they would basically oxidize the planet so the planet would become big red and rustic. If it has oxygen that'd be kind of interesting because oxygen is not stable and so something would be making that oxygenYeah this would be your first indication or at least your first hint of life i guess yeah.
How do we discover more exoplanets? Neil deGrasse Tyson and comedian Matt Kirshen explore telescopes, exoplanets, and more with professor of astrophysics and Principal Investigator of HATNet Exoplanet Survey, Gáspár Bakos.
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Photo Credit: Juliancolton, CC BY-SA 4.0, via Wikimedia Commons
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