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A really, really, really, really stupid idea. Really.
I was reading about this stuff about the supposed micro-impact debris found
imbedded in mammals remains dating from ~13000 yrs ago and I suddenly realized
that the people proposing this inanity or being really stupid. They have been
watching too many SciFi flicks in which the boulder sized asteroids crash
into the ground at thousands of miles per hour leaving an incandescent trail.
This is something the Myhtbusters would bust in short order.
Consider what happens when a ner-do-well tourist chucks a quarter from the
top of the Empire State Building. When I was a kid a cousin was all excited
about how it hits the side walk at soemthing like a thousand miles per hour
because of the acceleration of gravity. if that were true then folks hit by
tossed from high places would end up dead. Of course, what really happens is
that any object the size of a boulder or smaller soon reaches terminal air
velocity as drags slows it down to its maximum gravity powered aerodynamic
This was shown on Mythbusters when Jamie and Adam found that pistol rounds
fired straight up at about 1000 mph returned at around 100 mph (they never did
find the rifle rounds, wind drift). If a meteorite that hits the outer
atmosphere at 40000 mph is the size of a fist when it smashes through your
will be traveling over 100 mph, and will probably be air cooled enough to
immediately pick up.
The drag induced deacceleration when an extraterrestrial object hits the
lower atmosphere produces such high G's that city block sized asteroids break
and explode as per the Siberian event about a century ago.
When a giant meteorite explodes either in the atmosphere or on the ground,
the sand sized debris is creates immediately slows down to well under a hundred
miles per hour once it hits the lower atmosphere. Any animals or bones so
close to the explosion that sand sized objects bury deep inside them or do
will be wiped out by the blast and heat in the first place. Assuming anything
is left the scorch and shock damage will be obvious. The 13K extinction
scenario has the oblect detonating over the N American ice sheet far from any
mammals. For animals and bones not in the lethal blast and burn zone any
micro debris that hits them will be in the form of a gentle rain of sand from
above as the debris cloud renters the atmosphere and filters down to the
Might irritate the eyes a little but that's about it.
I cannot believe that grown up scientists would propose that micro blast
debris was gouging bones and skin. Cannot believe it is taken seriously by
else. Here we are trying to deal with a science skeptical public and they say
something so dumb. Just great.
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