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Content with the tag: “nai cub team”
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Astrobiology Researchers Earn Kudos
Four researchers whose work is supported by NASA’s Astrobiology Program were singled out for recognition by their scientific peers last year. Norman R. Pace, Mitchell L. Sogin, John P. Grotzinger, and Nora Noffke all received awards in 2007 for their contributions to science.
Norman Pace, professor of molecular, cellular, and developmental biology at the University of Colorado in Boulder, earned the American Society for Microbiology (ASM) 2007 Abbott-ASM Lifetime Achievement Award for outstanding contributions to...
January 31, 2008 / Posted by: Wendy Dolci
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What Is Life? Definition vs. Theory
NAI’s “Philosopher in Residence” Carol Cleland of the University of Colorado Team is featured in this thought provoking article from SEED magazine. It gives a history of the problem of defining life, from Schrodinger’s “that which avoids the decay into equillibrium,” through the molecular revolution, and examines it in the context of ALH84001.
September 9, 2007 / Posted by: Shige Abe
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NASA Astrobiologists Elected to National Academy of Sciences
Congratulations are due to astrobiologists Donald E. Canfield and Paul G. Falkowski for their election to the distinguished ranks of membership in the National Academy of Sciences.
May 1, 2007 / Posted by: Shige Abe
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Final Assembly of Earth-Like Planets
NAI Postdoctoral Fellow Sean Raymond leads a team of authors from NAI’s University of Colorado, Boulder, and University of Arizona Teams, and Virtual Planetary Laboratory and University of Washington Alumni Teams in a new publication in Astrobiology. They present analysis of water delivery and planetary habitability in 5 high-resolution simulations forming 15 terrestrial planets. Their results outline a new model for water delivery to terrestrial planets in dynamically calm systems, which may be very common in the Galaxy.
April 16, 2007 / Posted by: Shige Abe
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NAI Scientist Receives Hazel Barnes Prize
Margaret Tolbert from NAI’s University of Colorado, Boulder Team, is receiving the 2007 UC-Boulder Hazel Barnes Prize. This prize is the University’s most prestigious faculty award. Tolbert has earned it, UC-Boulder has announced, “for her contributions to understanding the chemistry and climate of planetary atmospheres, including past and present,” and “for her teaching and research efforts with undergraduates and graduate students, 15 of whom have won prestigious NASA and Environmental Protection Agency fellowships in recent years.” Congratulations Margaret!
April 12, 2007 / Posted by: Shige Abe
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NAI Scientists Honored by American Society for Microbiology
The American Society for Microbiology recently announced its 2007 General Meeting Award Laureates, and two NAI scientists have received honors. Mitch Sogin, PI of NAI’s Marine Biological Laboratory Team, is presented with the USFCC/J. Roger Porter Award for his research in environmental microbial diversity. Norm Pace, from NAI’s University of Colorado, Boulder Team, is presented with the Abbott/ASM Lifetime Achievement Award for his outstanding contributions and research in the field of microbial ecology. Congratulations Norm and...
March 25, 2007 / Posted by: Shige Abe
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Biogeochemistry and Oxygenic Photosynthesis
Researchers from NAI’s University of Colorado, Boulder Team recently reported in Earth and Planetary Science Letters their new biogeochemical model relating to the Great Oxidation Event. With ion microprobe data for individual sulfides from water-lain sedimentary units in the 2.45–2.22 Ga Huronian Supergroup, the team proposes a new model where enhanced weathering rates during interglacial thawing stimulated blooms of oxygenic photosynthesis, the demise of methane, and ultimately the irreversible rise in atmospheric oxygen between the first and second Huronian...
February 7, 2007 / Posted by: Shige Abe
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Organic Hazes on Early Earth and Titan
Researchers from NAI’s Unviersity of Colorado, Boulder and University of Arizona Teams have published a new study in PNAS this week about the atmospheres of both present day Titan and early Earth. For Titan, their experiments modeled conditions measured by the Huygens probe from NASA’s Cassini mission, and CO2 was added to model the early Earth conditions. They conclude that organize haze can form over a wide range of methane and carbon dioxide concentrations.
November 6, 2006 / Posted by: Shige Abe
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NASA Study Shows Titan and Early Earth Atmospheres are Similar
Organic haze in the atmosphere of Saturn’s moon, Titan, is similar to haze in early Earth’s air — haze that may have helped nourish life on our planet— according to a NASA Astrobiology Institute study released Nov. 6, 2006.
November 5, 2006 / Posted by: Shige Abe
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Exotic Earths
Collaborators from NAI’s Teams at NASA Goddard Space Flight Center, University of Colorado, Boulder, and Penn State as well as the former Virtual Planetary Lab Team have a paper this week in Science discussing the possible formation of “Exotic Earths.” Their models have simulated terrestrial planet growth during and after inward giant planet migration. Their results cause them to speculate that more than a third of the known systems of giant planets may harbor Earth-like planets.
September 7, 2006 / Posted by: Shige Abe
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Planets Around the Stars
Researchers from NAI’s University of Washington, University of Colorado, Boulder, and Virtual Planetary Laboratory Teams have developed models testing planet formation in four known systems, 55 Cancri, HD 38529, HD 37124 and HD 74156. Placing Mars to Moon-sized planet embryos between giant planets and allowing them to evolve for 100 million years, they found terrestrial planets formed readily in 55 Cancri, sometimes with substantial water and orbits in the system’s habitable zone. They found HD 38529 is likely to...
July 24, 2006 / Posted by: Shige Abe
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Akilia Revisited
Scientists from NAI’s UCLA and University of Colorado, Boulder Teams recently published their new geologic and geochemical analysis of the ancient rocks on Akilia Island in West Greenland which were the subject of a controversial Nature paper ten years ago. This new study includes a thorough geologic map of the area, and, using the ion-microprobe to analyze carbon inclusions in the rock, outlines a carbon isotopic ratio indicative of life’s signature. Their work appears in the current issue...
July 24, 2006 / Posted by: Shige Abe
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Chemical Energy for Life on Early Earth and Mars
Researchers from NAI’s NASA Ames Research Center and University of Colorado, Boulder Teams published in the current issue of Astrobiology their study of the petrology and mineral chemistry of a cold spring in Northern California. They propose that the serpentinization process can provide a source of energy for chemosynthetic organisms, and outline criteria to aid in the identification of serpentinizing terranes on Mars.
June 5, 2006 / Posted by: Shige Abe
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Biodiversity in Hypersaline Mats
Researchers at NAI’s University of Colorado, Boulder and Marine Biological Laboratory Team published their analysis of biodiversity in hypersaline microbial mats in a recent issue of Applied and Environmental Microbiology. Bacteria dominated the mat in unprecedented diversity representing 752 species, including 15 novel candidate phyla.
May 17, 2006 / Posted by: Shige Abe
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Alternative Model for Diagenesis of Meridiani Bedrock
Tom McCollom of NAI’s University of Colorado Lead Team and his co-author Brian Hynek published the details of their alternative model today in Nature. The scenario does not require prolonged interaction with a standing body of surface water, and describes an environment less favorable to biological activity on Mars.
December 20, 2005 / Posted by: Shige Abe
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Shark Bay Stromatolites Revealed
Members of NAI’s University of Colorado Team published a study of the composition and structure of the Shark Bay stromatolites in this month’s Applied and Environmental Microbiology. Their rRNA studies revealed the most abundant sequences representing novel proteobacteria, with a surprising less than 5% representing cyanobacteria.
August 17, 2005 / Posted by: Shige Abe
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Microbial Ecology of Hot Spring Communities in Yellowstone
New studies from NAI’s University of Colorado team published in the February 15, 2005 issue of PNAS implicate the oxidation of molecular hydrogren as the source of energy for primary productivity in high temperature microbial ecosystems in Yellowstone.
June 9, 2005 / Posted by: Shige Abe
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Increased H2S in the Deep Ocean - Bad News for Life?
NAI scientists on the Penn State and University of Colorado teams published recently in Geology their studies showing that increases in the level of hydrogen sulfide in the deep ocean during oceanic anoxic periods in Earth’s history could cause elevated H2S levels in shallower waters and in the atmosphere. This may have caused, they propose, destruction of the ozone shield and an increase in atmospheric methane, and may have helped spell the end for life at several extinction events.
May 16, 2005 / Posted by: Shige Abe
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