New Study Counters Clovis Comet “There’s no plausible mechanism
to get airbursts over an entire continent,” said Boslough, a
physicist. “For this and other reasons, we conclude that the
impact hypothesis is, unfortunately, bogus.” In a December 2012
American Geophysical Union monograph, first available in
January, the researchers point out that no appropriately sized
impact craters from that time period have been discovered, nor
have any unambiguously “shocked” materials been found. In
addition, proposed fragmentation and explosion mechanisms “do
not conserve energy or momentum,” a basic law of physics that
must be satisfied for impact-caused climate change to have
validity, the authors write. Also absent are physics-based
models that support the impact hypothesis. Models that do exist,
write the authors, contradict the asteroid-impact hypothesizers.
The authors also charge that “several independent researchers
have been unable to reproduce reported results” and that samples
presented in support of the astero