Deep biosphere microbes expand the chemical signatures of life

Search for signs of ancient microbial life in the geological record is challenging due to degradation of the primary organic material. Therefore, proof of biogenic origin often relies on chemical signatures that microorganisms ...

New study sheds light on Moon's slow retreat from frozen Earth

A study led by University of Colorado Boulder researchers provides new insight into the Moon's excessive equatorial bulge, a feature that solidified in place over four billion years ago as the Moon gradually distanced itself ...

Understanding the glacial history of the western Arctic

To interpret what we see today both on land and at the seabed, we need to understand how the landscape was different in the past. When we say "past," we mean on a geologic timeframe—specifically, about 10,000 to 20,000 ...

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