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Latest Daniel Glavin Stories

Tagish Lake Meteorites Help Solve Amino Acid Mysteries
2012-07-26 14:48:28

Lee Rannals for redOrbit.com - Your Universe Online New clues have been unveiled that shed light on why living things use only molecules with specific orientations. Research analyzing meteorite fragments that fell on a frozen lake in Canada is providing strong evidence that liquid water inside an asteroid leads to a preference of left-handed over right-handed forms of common protein amino acids in meteorites. "Our analysis of the amino acids in meteorite fragments from Tagish Lake...

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2011-01-26 11:53:59

Scientists have found more evidence that life on Earth may have been seeded by material from asteroids or comets. Prior research has shown how amino acids could form elsewhere in the cosmos. These molecules can form in two versions, but life on Earth exclusively uses just one of them. New research shows how conditions around a far-flung star could favor the formation of one type over another. Amino acids are corkscrew-shaped molecules that can form twisted to the left or right, and...

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2011-01-19 12:15:00

According to new NASA research, a wider range of asteroids were capable of creating the kind of amino acids used by life on Earth. Researchers at NASA's Goddard Space Flight Center reported in 2009 that they discovered an excess of the left-handed form of the amino acid isovaline in samples of meteorites that came from carbon-rich asteroids.  NASA said that this discovery suggests that left-handed life got its start in space, where conditions in asteroids favored the creation of...

2009-03-17 12:46:00

GREENBELT, Md., March 17 /PRNewswire-USNewswire/ -- NASA scientists analyzing the dust of meteorites have discovered new clues to a long-standing mystery about how life works on its most basic, molecular level. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) "We found more support for the idea that biological molecules, like amino acids, created in space and brought to Earth by meteorite impacts help explain why life is left-handed," said Dr. Daniel Glavin of NASA's Goddard...

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2009-03-17 12:15:00

NASA scientists analyzing the dust of meteorites have discovered new clues to a long-standing mystery about how life works on its most basic, molecular level. "We found more support for the idea that biological molecules, like amino acids, created in space and brought to Earth by meteorite impacts help explain why life is left-handed," said Dr. Daniel Glavin of NASA's Goddard Space Flight Center in Greenbelt, Md. "By that I mean why all known life uses only left-handed versions of amino acids...

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2006-12-14 14:25:00

Just as kits of little plastic bricks can be used to make everything from models of the space shuttle to the statue of liberty, comets are looking more and more like one of nature's toolkits for creating life. These chunks of ice and dust wandering our solar system appear to be filled with organic molecules that are the building blocks of life. The discovery of two kinds of nitrogen-rich organic molecules in comet Wild 2 is the latest addition to the set of bits and pieces useful to the...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'