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1er juin 2017

The Spider Web That Gets Stronger When It Touches Insects [The Atlantic]

Its threads reinforce themselves by sucking up chemicals from the victim’s own shell.

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1er juin 2017

Ticks use sticky pads on their feet to cling on to our skin [New Scientist]

A tick’s sophisticated weaponry doesn’t end with its needle-like mouthparts, capable of piercing through human skin and inflicting itchy agony.
Each leg has a pair of claws that can grasp surfaces, and between them – it has now been discovered – is a foldable pad that can spread out like a fan and stick to the smoothest of surfaces.

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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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