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Welcome
Scientists at DTM bring the perspective of several disciplines to broad
questions about nature. DTM's name comes from its original role to
chart the Earth's magnetic field. This goal was largely accomplished by
1929. Since then, DTM has evolved to reflect the growing multi-
disciplinary nature of the Earth, planetary, and astronomical sciences.
Today, the historic goal remains-to understand the physical Earth and
the universe that is our home.
The above image is a map tracing the voyages that the Carnegie and the Galilee research vessels undertook, beginning in 1905.
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Monday, 17 March 2008 |
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Postdoctoral Associate John Debes, former NAI Associate Margaret Turnbull, now at the Global Science Institute in Wisconsin, and former staff member Sara Seager, now at MIT, were interviewed for the Canadian radio program, “Quirks and Quarks,” in an astrobiology-related program entitled “Anything Out There?” To listen to the full broadcast, click here.
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Monday, 17 March 2008 |
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Conel Alexander, Marilyn Fogel of the Geophysical Laboratory, and colleagues have discovered concentrations of amino acids in two meteorites—ten times higher than levels previously measured in other similar meteorites—indicating that the early solar system was far richer in these organic substances than previously thought. The study will appear in the upcoming issue of Meteoritics and Planetary Science.
Alexander and colleagues took small samples from three CR chondrites, thought to contain the oldest and most primitive organic materials found in meteorites. Their analysis revealed that while one sample showed a relatively low abundance of amino acids, the other two meteorites had the highest ever seen in primitive meteorites—180 and 249 ppm. Other primitive meteorites that have been studied generally have amino acid concentrations of 15 ppm or less.
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Read more...
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Friday, 14 March 2008 |
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Former Geophysical Laboratory (GL) postdoctoral fellow Matt Schrenk joined DTM as a Carnegie Fellow on 21 February. A microbial geochemist, Schrenk studies feedbacks between microorganisms and their geochemical environment. He is particularly interested in microbial growth on and within rocks in polymer-encased structures known as biofilms. At GL, Schrenk studied biofilms in extreme habitats, such as highly acidic environments associated with acid mine drainage and high-temperature and high-pressure environments associated with deep-sea hydrothermal vents.
Schrenk is currently working with former DTM staff member Sara Seager, now at MIT, on assessing the prospects for life on extrasolar planets by developing applicable models for habitability and life detection on distant planets and in Earth’s subsurface. Schrenk will be at DTM through August, when he will begin a faculty position in microbiology at East Carolina University in Greenville, NC.
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