A new view of mass extinctions... (Endings)

by xeno6696 , Sonoran Desert, Thursday, July 02, 2009, 04:15 (5622 days ago) @ David Turell

What they're talking about is the sun bobbing through the central plane of the milky way. When it's on the topside of the disc--that's when we're bombarded with more cosmic rays, due to the backlash of a cluster we're hurtling towards. 
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> Matt: I understood that. I was pointing out that there are more cycles than they took into account and they didn't relate their findings to the geologic timing of extinctions. Some one should amalgamate all of the cycles and we might find something interesting. - Acknowledged. - How many mass extinctions are on record?