Archive: 23/03/2009

Astronauts complete 3rd and final spacewalk

(AP) -- Two astronauts who were teaching math and science to middle school students just five years ago went on a spacewalk together Monday, their path cleared of dangerous orbiting junk that had threatened the space station ...

dateMar 23, 2009 in Space Exploration
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Redefining DNA: Darwin from the atom up

In a dramatic rewrite of the recipe for life, scientists from Florida today described the design of a new type of DNA with 12 chemical letters instead of the usual four. Presented here at the 237th National Meeting of the ...

dateMar 23, 2009 in Biochemistry
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Time (and PPAR-beta/delta) heals all wounds

Mammalian skin requires constant maintenance, but how do skin cells know when to proliferate and at what rate? In the March 23, 2009 issue of the Journal of Cell Biology, Nguan Soon Tan and colleagues reveal that skin fibroblasts ...

dateMar 23, 2009 in Cell & Microbiology
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