Bacteria may be able to survive in salty water on Mars.

A group of microbes found in a highly acidic, hot, mineral-rich volcanic lake in Central America may give us clues about life on ancient Mars.

The cooling of Earth’s mantle via plate tectonics increased the amount of phosphorus in the planet’s crust, which is vital for biochemistry.

Water is the basis for life as we know it, but did life’s building blocks form without it?

Does all life depend on water? Titan may be home to methane-based life forms.