Crater of ‘extinction meteor’ discovered?

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Resea-rchers claim to have discovered the elusive impact crater of the meteor that triggered the biggest extinction ever, around 252.3 million years ago.

While the idea that an impact caused the Permian extinction has been around for a while, what’s been missing is a suitable crater to confirm it, researchers said.
Researcher Eric Tohver from the University of Western Australia believe he has found the impact crater which reveals though the trigger was the same, the details are significantly different.
In 2012, Tohver redated an impact structure that straddles the border of the states of Mato Grosso and Goias in Brazil, called the Araguainha crater, to 254.7m years.
Previous estimates had suggested Araguainha was 10m years younger, but Tohver has put it within geological distance of the extinction date.
The Chicxulub crater in Mexico, is 180km in diameter while the Araguainha is 40 kilometres across and was thought to be too small to have caused the chain reaction which brought about such mass extinction.