How light reflected by vegetation, varying through time, is a strong biosignature.

How the presence of oxygen and other disequilibrium gases could signpost life.

Habitable planets may be more likely around warmer M-dwarfs.

Elements found in the mantles of Earth and Mars could be indicative of giant impacts early in the histories of both planets.

Asteroids key to understanding our Solar System's formation.

The Gale Crater site once flowed with rivers ending in a lake.

Ocean chemistry became favorable to macro-organisms.

Huge electromagnetic blasts immediately impact life.

The credibility of trace fossils up in the air.

Strip away the atmosphere and a mini-Neptune might have a habitable core.