Since has been on and left a clear record with its in the rocks, we can see that there have been several widespread extinctions of life all round the Earth.
Graph modified after Verisimilus
The graph shows the percentage of marine animals becoming extinct. The five major events are:
One theory is that these are caused by huge impacts. These may be , or they may have come from outside the . The they release is huge. It is far more than all our exploding at the same time!
There was a mass extinction at around 250 mya. After that the began to dominate the Earth.
There was another one, the last of these mass extinctions, about sixty mya when the dinosaurs died out.
So if the sixty million year theory is correct we might be due for another impact any day now!
Image copyright Joe Tucciarone
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