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12 octobre 2018

Humans may have colonized Madagascar later than previously thought [Phys]

New archaeological evidence from southwest Madagascar reveals that modern humans colonized the island thousands of years later than previously thought, according to a study published October 10, 2018 in the open-access journal PLOS ONE by Atholl Anderson from the Australian National University, Canberra, Australia, and colleagues.

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12 octobre 2018

Ariège : un outil unique au monde pour étudier l’impact du réchauffement climatique sur les animaux [La Dépêche du Midi]

La station d’écologie expérimentale du CNRS installée à Moulis pourra bientôt utiliser un dispositif inédit pour étudier les effets du réchauffement climatique sur les espèces aquatiques. 144 bassins sont en cours d’installation sur le site. Les travaux devraient se terminer le mois prochain.

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11 octobre 2018

Ants regulate growth of seemingly ’useless’ organ to make huge soldiers [Phys]

Scientists at McGill have found the answer to a question that perplexed Charles Darwin. So much so, that it actually led him to doubt his own theory of evolution. He wondered, if natural selection works at the level of the individual, fighting for survival and reproduction, how can a single colony produce worker ants that are so dramatically different in size—from the "minor" workers with their small heads and bodies, to the large-headed soldiers with their huge mandibles—especially if, as in the genus Pheidole, they are sterile ?(...)

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11 octobre 2018

Scientists go ’back to the future,’ create flies with ancient genes to study evolution [Phys]

Scientists at New York University and the University of Chicago have created fruit flies carrying reconstructed ancient genes to reveal how ancient mutations drove major evolutionary changes in embryonic development—the impact of which we see today.

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11 octobre 2018

Oldest fossil of a flying squirrel sheds new light on its evolutionary tree [Phys]

The oldest flying squirrel fossil ever found has unearthed new insight on the origin and evolution of these airborne animals.

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