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20 janvier 2017

Humans, not climate change, wiped out Australian megafauna [Phys]

New evidence involving the ancient poop of some of the huge and astonishing creatures that once roamed Australia indicates the primary cause of their extinction around 45,000 years ago was likely a result of humans, not climate change.

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20 janvier 2017

The astonishing science behind the desert’s mysterious fairy circles [The Washington Post]

“This is a classic thing in ecology where debates will emerge and go on for decades,” said Rob Pringle, an ecologist at Princeton University. “And the resolution after all that time is usually, ’Well, it’s a little bit of both.’ ”
That’s the conclusion of a new paper Pringle and his colleagues published Wednesday in the journal Nature.(...)

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20 janvier 2017

Foxes may confuse predators by rubbing themselves in puma scent [New Scientist]

They have a reputation as cunning creatures, and some foxes appear to be living up to it as masters of disguise.
Gray foxes living in the mountains of California have been filmed deliberately rubbing themselves in the scent marks left by mountain lions.
They may be using the scent of the big cats, also known as pumas or cougars, as a sort of odour camouflage against other large predators such as coyotes.(...)

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19 janvier 2017

Les singes pourraient disparaître d’ici vingt-cinq ans à cinquante ans [Le Monde - Biodiversité]

Selon une étude, 60 % des espèces de primates sont en danger d’extinction en raison d’activités humaines. 75 % des populations accusent déjà un déclin.

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19 janvier 2017

New species of poison frog discovered in Amazonian slopes of Andes in southeastern Peru [Mongabay]

The species is commonly known as the Amarakaeri poison frog. Its scientific name is Ameerega shihuemoy — with the species name, shihuemoy, being the native Harakmbut word for “poison dart frog.”

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