The giant impact that shook the Earth 65 million years ago is still sending out shock waves, triggering a scientific feud over whether the event really killed off the dinosaurs.
Efforts to identify what wiped out the great creatures have been confused by evidence of massive volcanic activity in India at the same time, and a fossil record that suggests the dinosaurs disappeared gradually as the Earth's climate and geology changed over millions of years.
Now a bitter row has broken out on CCNet, a scholarly electronic network, over a paper by Peter Schulte of the Universität Erlangen-Nürnberg and colleagues in the journal Sedimentary Geology: they conclude that two cores drilled in Brazos, Texas, provide new support for the much-loved disaster movie scenario.
I post because it's similar to the post-Pleistocene extinction debate in archaeology. For many, human overkill has become the accepted cause of the megafauna demise while others are far less impressed with the evidence (such as it is).