Instead, the team hypothesized a stellar explosion may have been a potential factor in the Late Devonian extinction event 372 million years ago and one at the end of the Late Ordovician 445 ...

Based on this, the team determined that 2.5 near-Earth supernovae occur per billion years —a figure that matches the timing of the Late Ordovician and Late Devonian extinctions.

Instead, the team hypothesized a stellar explosion may have been a potential factor in the Late Devonian extinction event 372 million years ago and one at the end of the Late Ordovician 445 ...

Unexplained mass extinctions on Earth In the study, the researchers provided no evidence that a supernova caused mass extinctions. Instead, the team hypothesized a stellar explosion may have been a ...

Instead, the team hypothesized a stellar explosion may have been a potential factor in the Late Devonian extinction event 372 million years ago and one at the end of the Late Ordovician 445 ...