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Ancient oceans offer new insight into the origins of animal life
Date:9/9/2009

se being steady and gradual over time, what we saw in our data was a very unstable situation with short-lived episodes of free oxygen in the atmosphere early in Earth's history, followed by plummeting levels around 2 billion years ago.

"It was not until a second rise in atmospheric oxygen 580 million years ago that larger complex animals were able to get a foothold on the Earth."


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Contact: Dr. Simon Poulton
s.w.poulton@ncl.ac.uk
44-191-222-6426
Newcastle University
Source:Eurekalert

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