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planetary science

Earth scientists hope that their growing knowledge of the planet’s early history will shed light on poorly understood features seen today, from continents to geysers.
geophysics

Explorers Find Passage to Earth’s Dark Age

December 22, 2016

Geochemical signals from deep inside Earth are beginning to shed light on the planet’s first 50 million years, a formative period long viewed as inaccessible to science.

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.