Boswell Wing

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...

Mining ancient ores for clues to early life

Published: 10Dec2012

An analysis of sulfide ore deposits from one of the world’s richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7 billion years ago, but also shows that microbes were...

What the “fecal prints” of microbes can tell us about E

Published: 23Dec2014

The distinctive “fecal prints” of microbes potentially provide a record of how Earth and life have co-evolved over the past 3.5 billion years as the planet’s temperature, oxygen levels, and...

Isotopic memory of atmospheric persistence

Published: 14Jan2015

Chemical analysis of some of the world’s oldest rocks, by an international team led by McGill University researchers, has provided the earliest record yet of Earth's atmosphere. The results show...

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