From Name:
From Email:
To Name:
To Email:

Optional Message:


World's oldest known oxygen oasis discovered

from Science Daily

In the Earth's early history, several billion years ago, only traces of oxygen existed in the atmosphere and the oceans. Today's air-breathing organisms could not have existed under those conditions. The change was caused by photosynthesizing bacteria, which created oxygen as a by-product — in vast amounts. 2.5-billion-year-old rock layers on several continents have yielded indications that the first big increase in the proportion of oxygen in the atmosphere took place then. more


Powered by MultiBriefs
7701 Las Colinas Blvd., Ste. 800, Irving, TX 75063