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16 mai 2017

Unfolding the folding mechanism of ladybug wings [Phys]

Japanese scientists have figured out how ladybugs fold their wings by transplanting a transparent artificial wing onto the insect and observing its underlying folding mechanism. The study’s findings, which help explain how the wings can maintain their strength and rigidity during flight, while becoming elastic for compact folding and storage on the ground, provide hints for the innovative design of a wide range of deployable structures, from satellite antennas to microscopic medical instruments to articles for daily use like umbrellas and fans.

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16 mai 2017

Soil Microbes May Be Orchestrating Tree Migrations [Scientific American]

Microscopic soil creatures may determine how quickly tree species march toward cooler conditions.

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16 mai 2017

Frisky female fruit flies become more aggressive towards each other after sex [Phys]

Female fruit flies start headbutting each other after mating, becoming significantly more aggressive and intolerant Oxford University research has revealed.

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16 mai 2017

La France va-t-elle sauver ses hérissons ? [Le Monde - Blogs]

Il est à la fois le garant de la bonne santé des campagnes, un précieux auxiliaire des jardiniers et un emblème de la biodiversité. Cet animal des plus communs et pourtant de plus en plus menacé, c’est le hérisson.

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15 mai 2017

Polar bears shift from seals to bird eggs as Arctic ice melts [New Scientist]

Polar bears are ditching seafood in favour of scrambled eggs, as the heat rises in the Arctic melting the sea ice. A changing coastline has made it harder for the predators to catch the seals they favour and is pushing them towards poaching goose eggs.

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