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geoscience

Searching for signs of life on faraway planets, astrobiologists must decide which telltale biosignature gases to target.
astrobiology

Scientists Debate Signatures of Alien Life

Searching for signs of life on faraway planets, astrobiologists must decide which telltale biosignature gases to target.

Did the minerals on our planet arise in a predictable fashion, or did they result from chance events? The answers could eventually help scientists identify planets likely to harbor life.
geophysics

How Life and Luck Changed Earth’s Minerals

Did the minerals on our planet arise in a predictable fashion, or did they result from chance events? The answers could eventually help scientists identify planets likely to harbor life.

Evidence from Southwestern deserts suggests that oxygen-breathing organisms arose on land rather than in the seas.
origins of life

Early Life in Death Valley

Evidence from Southwestern deserts suggests that oxygen-breathing organisms arose on land rather than in the seas.