Mystery of where Earth's water came from deepens: Comet water is different
The mystery of where Earth's water came from got murkier Wednesday when some astronomers essentially eliminated one of the chief suspects: comets.
The mystery of where Earth's water came from got murkier Wednesday when some astronomers essentially eliminated one of the chief suspects: comets.
Space Exploration
Dec 10, 2014
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(PhysOrg.com) -- New research challenges the controversial theory that the impact of an ancient comet devastated the Clovis people, one of the earliest known cultures to inhabit North America.
Archaeology
Sep 29, 2010
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A new study reports that charcoal particles left by wildfires in sediments of 35 North American lake beds don't readily support the theory that comets exploding over the continent 12,900 years ago sparked a cooling period ...
Earth Sciences
Jan 28, 2009
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Comets always seem to bring 'em out of the wood work.
Space Exploration
Apr 30, 2013
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