It has become the orthodox doctrine that the end-Cretaceous extinctions which inter alia got rid of the dinosaurs were the result of an asteroid impact, despite the rearguard resistance of a minority of paleontologists who prefer more gradualist explanations.
It now seems that the debate may reopen. Drill cores from the area of the impact crater itself are said to show some marine organisms persisting serenely for long after the impact. For a news report see here.
Comments are closed.