exoplanets

Billion-year-old lake deposit yields clues to Earth’s ancient biosphere

Published: 18Jul2018

A sample of ancient oxygen, teased out of a 1.4 billion-year-old evaporative lake deposit in Ontario, provides fresh evidence of what the Earth’s atmosphere and biosphere were like during the...

New theory on how Earth’s crust was created

Published: 5May2017

More than 90% of Earth’s continental crust is made up of silica-rich minerals, such as feldspar and quartz. But where did this silica-enriched material come from? And could it provide a clue in the...