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geoscience

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

Scientists Debate Signatures of Alien Life

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

<p>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.</p>
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.

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