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Gargantuan asteroid that struck Oz likely led to mass extinctions worldwide

Last Updated: Wednesday, February 20, 2013, 11:52

A giant asteroid that struck Australia more than 300 million years ago changed the face of the Earth forever, a new study has claimed.

Killer algae may be guilty of world’s greatest mass extinctions

Last Updated: Tuesday, October 20, 2009, 14:36

A new theory has suggested that the seemingly lowly algae may be the killer behind the world’s great species mass extinctions.