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15 décembre 2017

Study on redback spiders finds seemingly abhorrent mating strategy appears to benefit both males and females [Phys]

A mating strategy among redback spiders where males seek out immature females appears to benefit both sexes, a new University of Toronto study has found.
"There’s no evidence to suggest this behaviour is costly to females in terms of survivorship and reproductive output," says Luciana Baruffaldi, post-doctoral researcher and director of the Andrade lab at U of T Scarborough and lead author of the research published in the journal Scientific Reports.

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14 décembre 2017

La fonte accélérée du Groenland confirmée [Le Monde - Blogs]

La glace de la calotte polaire du Groenland est-elle en train de fondre vraiment plus vite qu’auparavant ? Et le changement climatique provoqué par nos émissions de gaz à effet de serre en est-il vraiment responsable ?

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13 décembre 2017

Engineers create plants that glow [Phys]

Imagine that instead of switching on a lamp when it gets dark, you could read by the light of a glowing plant on your desk.
MIT engineers have taken a critical first step toward making that vision a reality. By embedding specialized nanoparticles into the leaves of a watercress plant, they induced the plants to give off dim light for nearly four hours. They believe that, with further optimization, such plants will one day be bright enough to illuminate a workspace.

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13 décembre 2017

How honey bee gut bacteria help to digest their pollen-rich diet [Phys]

The honey bee gut is colonized by specialized bacteria that help digest components of the floral pollen diet and produce molecules that likely promote bee health. In a study publishing 12 December in the open access journal PLOS Biology, a group of researchers led by Philipp Engel at the University of Lausanne and ETH Zürich, Switzerland, have uncovered which bacterial species perform which specific digestive functions in the bee gut.

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13 décembre 2017

One Planet Summit : la finance "verte" au chevet du climat ? [Notre-planete]

Organisé à l’initiative de la France, avec les Nations unies et la Banque mondiale, le One Planet Summit vise à célébrer les deux ans de l’Accord de Paris en accélérant sa mise en œuvre. Ce sommet international, dédié à la mobilisation autour d’engagements et de projets concrets a rassemblé 4000 acteurs engagés dans la lutte contre le changement climatique.

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