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CaptainFossil's Comments

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'Black Mat' Sediment, Linked To Extinction Debate, Likely Not From Outer Space

'Black Mat' Sediment, Linked To Extinction Debate, Likely Not From Outer Space

Commented Apr 24, 2012 at 19:40:12 in Science

“That's actually one of the challenges with the bolide scenario; the late Pleistocene North American extinction (which WASN'T a mass extinction, BTW, or even anywhere close to being one) was actually pretty specifically focused on large mammals and other animals that preyed upon them. Smaller and micro mammals, most birds, and virtually all bugs, beetles, & plants made it through the end of the Pleistocene and into the Holocene just fine ... as did all marine organisms. A cometary or meteoric impact of sufficient size to cause *any* continent-wide extinctions would almost certainly cut a broader swath of destruction across the animal/plant spectrum. The ET event proponents have never successfully proposed a valid mechanism for how such a weirdly selective extinction event might have resulted from an impact.”

Reno Fickler on Apr 24, 2012 at 21:06:12

“OK, Cpt., lets assume except for minor, local events an impact had nothing to do with the extinctions of the Pleistocene age. During the years of that age (at least here in No. Amer.) The Yellowstone 'super-volcano' had at least four eruptions, one every appx. 600,000 years. considering that and the fact that the small animals, birds, bugs, etc, you mentioned have the ability to rapidly repopulate large areas in a short (maybe a very few thousands of years) time. As you stated, the large herbivores and carnivores died out due to lack of sustinence in short order. The plants would have died due to the workings of photosynthesis but returned when the sun shone again. Possible explanation or should I watch the Science chnl some more??”