And though Chatterjee's abstract was approved by conference organizers for the Geological Society of America meeting, this research has not been peer-reviewed in a scientific journal.
The Impact Idea
The prevailing theory behind the mass extinctions remains the Chicxulub impact idea.
"I would say 95 percent or more of the earth scientists who study the KT boundary are in agreement that Chicxulub is the event that brought on the KT mass extinctions," said geophysicist Sean Gulick of the University of Texas at Austin.
As for the Shiva hypothesis, Gulick was very doubtful.
"There's a bunch of problems to say the least," Gulick said of Chatterjee's hypothesis. "There is no evidence that he's presenting of it actually being a crater."