"Today, my colleagues in astrobiology no longer assume that life started at hot vents deep in the oceans. For many, the focus has shifted to locales on land — notably hot spring environments. This shift has also transformed science’s consideration of where life might start in the universe and how common it could be, and provides an upgraded framework to address the age-old question: Are we alone?"
Someone on Reddit was asking if there is any way of detecting something in an exoplanet atmosphere which would have no other explanation than life. I'm pretty happy with my answer.
You might be surprised that it even includes #Python code.