Terrestrial Biosphere Originated ~300 mya Earlier Than Thought?

[PortalHunter]

http://www.pnas.org/content/early/2015/10/14/1517557112

Versions of this article have been circulating on Facebook and on several sites I visit.

Articles from The Guardian and from IFLScience.

This suggests that life on Earth started quite soon after the Late Heavy Bombardment.