Primordial Water
Article Abstract:
The plentiful supply of both hydrogen and oxygen in the sun indicates that water molecules must have been a part of the solar nebula that was responsible for forming the planets. Meteorites can help confirm or deny this assumption, and two separate studies have indicated the presence of water molecules in meterorites
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1999
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Extraterrestrial handedness?
Article Abstract:
Amino acids are transcribed into proteins with a single chirality, although there is no known biochemical reason why the L enantiomer should be favored over the D-enantiomer. New anlyses of the Murchison meteorite, first studied in 1970, show a bias toward l-amino acids of extraterrestrial origin.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1997
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Is "primordial" helium really extraterrestrial?
Article Abstract:
A new hypothesis proposes that subducted extraterrestrial material rather than a primitive mantle reservoir is the source of helium-3 isotopes in the earth's mantle.
Publication Name: Science
Subject: Science and technology
ISSN: 0036-8075
Year: 1993
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