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Il y a 2,1 milliards d'années, la vie bougeait déjà

mercredi 13 février 2019 — Vie et Terre
L'apparition des premiers mouvements chez des êtres multicellulaires sur Terre serait bien plus ancienne que ce que l'on pensait. C'est du moins ce que suggèrent de petits tunnels fossilisés...

On the Origin of Darwin

mercredi 13 février 2019 par Steve Mirsky — The Sciences, Arts & Culture, Biology, Evolution
On this 210th anniversary of Darwin's birth we hear evolution writer and historian Richard Milner perform a brief monologue as Charles Darwin, and former Scientific American editor in chief John... -- Read more on ScientificAmerican.com

Deep learning and process understanding for data-driven Earth system science

mercredi 13 février 2019 par Markus Reichstein, Gustau Camps-Valls, Bjorn Stevens, Martin Jung, Joachim Denzler, Nuno Carvalhais, Prabhat
Deep learning and process understanding for data-driven Earth system science Deep learning and process understanding for data-driven Earth system science, Published online: 13 February 2019; doi:10.1038/s41586-019-0912-1Complex Earth system challenges can be addressed by incorporating spatial (...)

Opportunity lost: NASA says goodbye to pioneering Mars rover

mercredi 13 février 2019 par Alexandra Witze
Opportunity lost: NASA says goodbye to pioneering Mars rover Opportunity lost: NASA says goodbye to pioneering Mars rover, Published online: 13 February 2019; doi:10.1038/d41586-019-00575-2Final attempt to contact elderly robot fails, ending its 15-year mission to explore the red (...)

Consistent patterns of nitrogen fixation identified in the ocean

mercredi 13 février 2019 par Nicolas Gruber
Consistent patterns of nitrogen fixation identified in the ocean Consistent patterns of nitrogen fixation identified in the ocean, Published online: 13 February 2019; doi:10.1038/d41586-019-00498-yNitrogen gas dissolved in the ocean must be fixed — converted into more-reactive compounds — before (...)

Optical cooling achieved by tuning thermal radiation

mercredi 13 février 2019 par Yannick De Wilde, Riad Haidar
Optical cooling achieved by tuning thermal radiation Optical cooling achieved by tuning thermal radiation, Published online: 13 February 2019; doi:10.1038/d41586-019-00526-xIt is well established that solid objects can be cooled by harnessing the properties of laser light. A laser-free (...)

Human cells reprogrammed to create insulin

mercredi 13 février 2019 par Matthew Warren
Human cells reprogrammed to create insulin Human cells reprogrammed to create insulin, Published online: 13 February 2019; doi:10.1038/d41586-019-00578-zPancreatic cells that don’t normally produce insulin can be modified to do so, and to help control blood sugar levels in diabetic (...)

High frequency of shared clonotypes in human B cell receptor repertoires

mercredi 13 février 2019 par Cinque Soto, Robin G. Bombardi, Andre Branchizio, Nurgun Kose, Pranathi Matta, Alexander M. Sevy, Robert S. Sinkovits, Pavlo Gilchuk, Jessica A. Finn, James E. Crowe Jr
High frequency of shared clonotypes in human B cell receptor repertoires High frequency of shared clonotypes in human B cell receptor repertoires, Published online: 13 February 2019; doi:10.1038/s41586-019-0934-8Many clonotypes in human B cell repertoires are shared, including between adult and (...)

Squalene accumulation in cholesterol auxotrophic lymphomas prevents oxidative cell death

mercredi 13 février 2019 par Javier Garcia-Bermudez, Lou Baudrier, Erol Can Bayraktar, Yihui Shen, Konnor La, Rohiverth Guarecuco, Burcu Yucel, Danilo Fiore, Bernardo Tavora, Elizaveta Freinkman, Sze Ham Chan, Caroline Lewis, Wei Min, Giorgio Inghirami, David M. Sabatini, Kıvanç Birsoy
Squalene accumulation in cholesterol auxotrophic lymphomas prevents oxidative cell death Squalene accumulation in cholesterol auxotrophic lymphomas prevents oxidative cell death, Published online: 13 February 2019; doi:10.1038/s41586-019-0945-5The authors find that loss of squalene (...)

Convergent estimates of marine nitrogen fixation

mercredi 13 février 2019 par Wei-Lei Wang, J. Keith Moore, Adam C. Martiny, François W. Primeau
Convergent estimates of marine nitrogen fixation Convergent estimates of marine nitrogen fixation, Published online: 13 February 2019; doi:10.1038/s41586-019-0911-2Convergent estimates of nitrogen fixation from an inverse biogeochemical and a prognostic ocean model show that biological carbon (...)

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