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If the great mass extinctions are not attributed to impacts (e. g., explained instead by episodes of volcanism or sea regressions), one must ask how the huge impacts that must have occurred failed to leave dramatic evidence in the fossil record.I love that particular point. The only answer that satisfies all the available data is, "delusional belief system". :') If experience is any guide, the delusional parade is going to begin, and I won't have to save my spot along the route for very long. :')
It's a small point but isn't a "near Earth impact" actually a "miss" ? And wouldn't the impact from a miss be zero?
The Chicxulub impact event caused the dinos to go extinct.The Day the World BurnedThe cataclysm went far beyond the regular insults from which living things must recover. The asteroid or comet flashed through the sky more than 40 times as fast as the speed of sound. It was so large that when its leading edge made contact with ground, its trailing edge was at least as high as the cruising altitude of a commercial airliner. It produced an explosion equivalent to 100 trillion tons of TNT, a greater release of energy than any event on our planet in the 65 million years since then... The crater, called Chicxulub after modern Maya villages in the area, is approximately 180 kilometers in diameter and is surrounded by a circular fault 240 kilometers across, apparently produced when the crust reverberated with the shock of the impact...
by David A. Kring
and Daniel D. Durda
Scientific American
November 27, 2003
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Gods, Graves, Glyphs topic:and group:Books, Magazines, Movies, Music
both of these are pretty small asteroids:
2006 JY26
1 in 185 chance
http://neo.jpl.nasa.gov/risk/2006jy26.html
2000 SG344
1 in 556 chance of Earth impact
http://neo.jpl.nasa.gov/risk/2000sg344.html
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