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17 mai 2017

Gladiator games : In the natural world, biodiversity can offer protection to weaker species [ScienMag]

If you pit a pair of gladiators, one strong and one weak, against each other 10 times the outcome will likely be the same every time : the stronger competitor will defeat the weak. But if you add into the field additional competitors of varying strength levels, even the weakest competitors might be able to survive — if only because they’re able to find a quiet corner to hide.
The same is true in the natural world, where in some ecosystems species compete with others for the space to survive and reproduce, according to a long-held scientific theory.

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17 mai 2017

Découverte de près de 500 millions d’hectares de forêts dont on ignorait l’existence ! [SciencePost]

Des scientifiques ont trouvé un demi-milliard d’hectares de forêts dont on ignorait l’existence jusqu’à aujourd’hui. Il s’agirait d’un défaut de détection de la part des satellites.

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16 mai 2017

New study upends established models of forecasting coextinction in complex ecosystems [Phys]

A study from Iowa State University researchers casts new light on how biologists understand the likelihood of coextinction among plants and animals that depend on one another for survival.

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16 mai 2017

A carnivorous plant’s prized genetic treasures, unveiled [Phys]

A new genomic analysis shows just how valuable this carnivorous lifestyle has been to the plant throughout its evolutionary history.Over millions of years, the species, Utricularia gibba, repeatedly retained and enhanced genetic material associated with its carnivorous nature—despite tremendous evolutionary pressure to delete DNA, the research finds.

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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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