DNA directly photographed for first time | Essentials

DNA directly photographed for first time

Human genome printed by JohnJobby
License (according to Flickr): Attribution-ShareAlike License

Excerpt:

Fifty-nine years after James Watson and Francis Crick deduced the double-helix structure of DNA, a scientist has captured the first direct photograph of the twisted ladder that props up life. Enzo Di Fabrizio, a physics professor at Magna Graecia University in Catanzaro, Italy, snapped the picture using an electron microscope. Previously, scientists had only seen DNA's structure indirectly. The double-corkscrew form was first discovered using a technique called X-ray crystallography, in which a material's shape is reconstructed based on how X-rays bounce after they collide with it. Enzo Di Fabrizio A bundle of DNA is supported by two silicon pillars. But Di Fabrizio and his colleagues developed a plan to bring DNA out of hiding. They built a nanoscopic landscape of extremely water-repellant silicon pillars.

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DNA Gene Genetics Double helix Genome Human genome X-ray James D. Watson

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Enzo Di Fabrizio

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James Watson

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• James D. Watson: dbpedia
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Francis Crick

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Alan Boyle

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FieldTerminology: DNA

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Source URL: msnbc.msn.com

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Fifty-nine years after James Watson and Francis Crick deduced the double-helix structure of DNA, a scientist has captured the first direct photograph of the twisted ladder that props up life.

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DNA directly photographed for first time

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• DNA
• news

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Full Content: http://www.msnbc.msn.com/id/50029929/ns/technology_and_science-science/

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Apollo 17 still leaves a mark on our memory | Essentials

Apollo 17 still leaves a mark on our memory

Earth, as Seen by Astronauts Eugene Cernan, Ronald Evans and Harrison Schmitt from Apollo 17 by The U.S. National Archives
License (according to Flickr): No known copyright restrictions

Excerpt:

This image from Dec. 7, 1972, shows a view of Earth as seen by the Apollo 17 crew - Gene Cernan, Ronald Evans and Harrison Schmitt - as they traveled toward the moon. The view extends from the Mediterranean Sea area to Antarctica. This was the first time the Apollo trajectory made it possible to photograph the south polar ice cap. By Alan Boyle It's been exactly 40 years since NASA sent astronauts to the moon for the last time, and even though more than half of all Americans weren't alive when Apollo 17 got off the ground, the mission still has a big impact on our collective memory. And perhaps the biggest impact comes in the form of a single photograph, the original Blue Marble picture of Earth's full disk. Hours after their launch on Dec.

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Apollo 17 Moon Eugene Cernan Harrison Schmitt Apollo program Polar region Earth Neil Armstrong

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Harrison Schmitt

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Gene Cernan

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• Eugene Cernan
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Ronald Evans

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• Ronald Evans: dbpedia
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Alan Boyle

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Technology: Apollo 17

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Technology: Apollo trajectory

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Science editor Alan Boyle's blog: Forty years after the last moonshot, Apollo 17 still strikes a chord, even for Americans who weren't alive when the mission was launched.

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Apollo 17 still leaves a mark on our memory

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Full Content: http://cosmiclog.nbcnews.com/_news/2012/12/07/15755286-40-years-later-apollo-17s-blue-marble-leaves-a-mark-on-our-memory?lite

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