search slide
search slide
pages bottom
Currently Browsing: Results for Tag "geological"

Billion-year-old air has five times more oxygen than expected

Billion-year-old air has five times more oxygen than expected Scientists have, for the first time, been able to directly analyze the atmosphere of Earth from nearly a billion years ago.A team of Canadian researchers developed a technique to recover microscopic pockets of air from ancient salt crystals, and they reveal Earth had a lot more oxygen than we thought in those days.