Description: |
Scientists have gleaned fresh insights into the chemistry of early Earth's atmosphere 2.7 billion years ago by analyzing fossilized micrometeorites. The study, indicates that ancient Earth's upper atmosphere contained about the same amount of oxygen as today, and that a methane haze layer separated it from an oxygen-starved lower atmosphere. These findings challenge the accepted view that Earth's ancient atmosphere was oxygen poor. [Source: Imperial College London]
|
|