Supernova of 2.2 million years ago left it’s traces upon the Earth (with link provided)


I thought that the following news was an interesting item concerning Earth’s magnetotactic bacteria:

 

http://www.astrobio.net/pressrelease/5453/supernova-left-its-mark-in-ancient-bacteria

 

The significance of the radioactive marker can be utilized in “dating” and pinning-down other events in the Earth’s early bio-history!

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