Snorkelers had found "what superficially looked like circular column bases, and paved floors," but no other signs of life, such as pottery

Previously, scientists had thought that creatures living in the southernmost regions of the planet would have been in a less perilous position during the mass extinction event 

Concentrations are highest in coal from the Appalachian Mountains

Results reverse the commonly accepted idea that the early Earth had a thicker atmosphere to compensate for weaker sunlight

A team of climate scientists made the surprising discovery from three years of data collected at Summit Camp

The only material we have from the very early Earth comes in the form of tiny, naturally occurring zircon crystals

Team adds new details to our understanding of the nature of life way down under

Deoxygenation due to climate change threatens marine life

The UK-wide research team developed new records of past CO₂ levels by analysing ancient ocean sediments

Some of the iron-metabolizing bacteria appear quite early on the tree of life, making the studies relevant to discovering the origins of life

ASU part of research that finds massive phosphorus buildup in landscape

The scientists were able to infer past ocean conditions, using foraminifera preserved in sediment cores