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geoscience

An ice sheet stretching into the distance.
Abstractions blog

How Earth’s Climate Changes Naturally (and Why Things Are Different Now)

July 21, 2020

Earth’s climate has fluctuated through deep time, pushed by these 10 different causes. Here’s how each compares with modern climate change.

astrobiology

Scientists Debate Signatures of Alien Life

February 2, 2016

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

geophysics

How Life and Luck Changed Earth’s Minerals

August 11, 2015

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.

origins of life

Early Life in Death Valley

April 24, 2014

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