Topic: Extremophiles

Thin layer of oxygen found on Dione may change search for alien life

After the Cassini probe's flyby over Saturn's frozen moon, Dione, scientists saw evidence of ionized oxygen molecules in its atmosphere. This could have interesting implications for astrobiology.

How does an arsenic-based life-form work, exactly?

Scientists have apparently discovered a type of bacteria that, unlike every other known form of life, uses arsenic instead of phosphorus as one of the basic components of its DNA molecules.

Life's foothold on Earth may reach back 4.4 billion years