Mass Extinction Detailed
From Times Staff and Wire Reports
A massive asteroid may have collided with Earth 251 million years ago and killed 90% of all life, an extinction even more severe than the meteorite impact believed to have snuffed out the dinosaurs 66 million years ago.
A new study, based on meteorite fragments in Antarctica, suggests that the greatest extinction in the planet’s history may have been triggered by a mountain-sized space rock that smashed into a southern land mass.
