Humanity may not be extraordinary but rather the natural evolutionary outcome for our planet and likely others, according to a new model for how intelligent life developed on Earth.

Scientists investigated microbial movement as a potential biosignature for detecting life on Mars and beyond, offering a ...

New research suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for photosynthesis.

Astronomers have detected an exoplanet just twenty light years away that's residing in its star's habitable zone.

Humans evolved late in Earth history. While this timing inspired the conclusion that humanlike life is a cosmic improbability ...