I cannot deny my training :-)

This is a view of Earth about 3.0 to 2.5 billion years ago. A very 
different place indeed. No continents to speak of, only volcanic 
islands; oceans with huge quantities of dissolved iron (greenish tint); 
atmosphere without oxygen and lots of methane and othe toxic gases 
(reddish tint); a Moon which is closer than today (huge tides); days a 
bit longer than today by a couple of hours.

A most significant change will come at about 2.4 billion years ago: the 
Great Oxygenation Event. That will be my next scene in this series.

Thomas

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