Re: Supernovae may have triggered two mass extinctions

On 4/5/25 5:40 PM, RonO wrote:

https://www.sciencedaily.com/releases/2025/03/250313130822.htm
 The evidence is pretty thin, but the claim is that the Devonian and Ordovician extinction events that occurred 372 and 445 million years ago, respectively, may have been caused by supernovas exploding within 65 light years (20 parsecs) of our solar system.
 Ron Okimoto
 

There isn't any evidence of supernovae, but but the reasons for thee extinctions aren't particularly clear.  Wikipedia has a good discussion of both.  The Ordovician had at least two pulses, which makes the supernova explanation less plausible.