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31 mai 2017

What Hyenas Can Tell Us About the Origins of Intelligence [Scientific American]

A long running project in Africa challenges “the social brain hypothesis”.

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31 mai 2017

Chaleur : en ville, les températures pourraient grimper de 8 °C d’ici 2100 [Futura-Planète]

Les prévisions d’augmentation des températures négligent trop le phénomène d’îlots de chaleur urbains, expliquent des scientifiques. Selon eux, les villes, où vit désormais plus de la moitié de l’humanité, subiront à l’horizon 2100 des hausses de plusieurs degrés, jusqu’à 8, risquant d’aggraver les problèmes de pollution et de santé publique. Tout ce qui peut réduire la température des cités est donc bon à prendre.

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30 mai 2017

Amazon rainforest may be more resilient to deforestation than previously thought [Phys]

The Amazon forest stores about half of the global tropical forest carbon and accounts for about a quarter of carbon absorption from the atmosphere by global forests each year. As a result, large losses of Amazonian forest cover could make global climate change worse.

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29 mai 2017

The high cost of communication among social bees [Phys]

Eusocial insects are predominantly dependent on chemosensory communication to coordinate social organization and define group membership. As the social complexity of a species increases, individual members require a greater diversity of signals. The communications of highly social insects such as wasps are well documented, but relatively little is known about the evolutionary transition between solitary and social living.

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29 mai 2017

Scientists are accidentally helping poachers drive rare species to extinction [The Conversation]

"But after we published our data, the landowners with whom we worked began to find trespassers on their properties. The interlopers had scoured online wildlife atlases. As well as putting animals at risk, this undermines vital long-term relationships between researchers and landowners."

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