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This article discusses an article in the journal of Geology, [earthsky.org]

The article links to the original article which says:

“Multiple lines of evidence point to one or more moderately nearby supernovae, with the strongest signal at ∼2.6 Ma. We build on previous work to argue for the likelihood of cosmic ray ionization of the atmosphere and electron cascades leading to more frequent lightning and therefore an increase in nitrate deposition and wildfires. The potential exists for a large increase in the prehuman nitrate flux onto the surface, which has previously been argued to lead to CO2 drawdown and cooling of the climate. Evidence for increased wildfires exists in an increase in soot and carbon deposits over the relevant period. The wildfires would have contributed to the transition from forest to savanna in northeast Africa, long argued to have been a factor in the evolution of hominin bipedalism.”

Seems an interesting idea but I assume hard to prove.

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Subject Views Written By Posted
Did supernovae blasts prompt humans to walk upright? 593 Eddie Larry 02-Jun-19 22:15
Re: Did supernovae blasts prompt humans to walk upright? 53 D-Archer 03-Jun-19 10:12
Re: Did supernovae blasts prompt humans to walk upright? 49 Lost_In_Place 08-Jun-19 06:53
Re: Did supernovae blasts prompt humans to walk upright? 45 Nolondil 08-Jun-19 14:31
Re: Did supernovae blasts prompt humans to walk upright? 64 Lost_In_Place 08-Jun-19 19:05


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