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Comment les Pygmées ont évolué pour s'adapter à la forêt tropicale

jeudi 30 juillet 2015 par Hugo Jalinière
L'analyse du développement des Pygmées par une équipe de chercheurs français révèle l'importance de la plasticité de la croissance dans l'évolution humaine.

"Imperfect" Vaccines May Aid Survival of Ultrahot Viruses

Certain vaccines prevent sickness and death, but don't block transmission—meaning they may actually give some viral strains an extra shot at survival. Christopher Intagliata reports -- Read more on

Last-Ditch Plan Aims to Prevent First Drought Extinction of Native Fish

The California drought threatens several of its native fish with extinction. Will the Sacramento River’s winter-run Chinook be the first to go? -- Read more on

Clues to How Homo sapiens Conquered Earth Emerge from Digs in South Africa [Slide Show]

Archaeological sites along the southern coast are yielding fresh insights into an enduring mystery of human evolution -- Read more on

Crumb of mouse brain reconstructed in full detail

jeudi 30 juillet 2015 par Alison Abbott
Digital map is step towards reconstructing a whole human brain.

2 Men in Court over Killing of Cecil the Lion

The men, who face charges of poaching, were paid $50,000 by an American hunter who killed Cecil, the country's best-known lion -- Read more on

TetZooCon 2015 Is On

mercredi 29 juillet 2015 — Evolution

RNA degradation paths in a 12-subunit nuclear exosome complex

mercredi 29 juillet 2015 par Debora Lika Makino, Benjamin Schuch, Elisabeth Stegmann, Marc Baumgärtner, Claire Basquin, Elena Conti
The eukaryotic exosome is a conserved RNA-degrading complex that functions in RNA surveillance, turnover and processing. How the same machinery can either completely degrade or precisely trim RNA substrates has long remained unexplained. Here we report the crystal structures of a yeast nuclear (...)

Synthetic biology: Ribosomal ties that bind

mercredi 29 juillet 2015 par Joseph D. Puglisi
The ribosome is the cellular complex of proteins and RNA molecules that synthesizes proteins. An artificial ribosome in which the two main subunits are tethered together creates opportunities for engineering this process. See Letter (...)

Microbiology: Cyanate fuels the nitrogen cycle

mercredi 29 juillet 2015 par Lisa Y. Stein
Cyanate, a degradation product of urea and cyanide, has been found to be a sufficient single substrate for the growth and reciprocal feeding of microorganisms that are essential to the global nitrogen cycle. See Letter p.105

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