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4 décembre 2017

The other Dodo : Extinct bird that used its wings as clubs [BBC - Science & Environment]

The extinct Dodo had a little-known relative on another island. This fascinating bird ultimately suffered the same fate as its iconic cousin, but we can reconstruct some of its biology thanks to the writings of a French explorer who studied it during his travels of the Indian Ocean.

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4 décembre 2017

Ce que les yeux de la coquille Saint-Jacques ont en commun avec le télescope [Sciences & Avenir - Animaux]

Dans les 200 yeux de la coquille Saint-Jacques (Pecten maximus), on ne trouve pas de cristallin, mais des miroirs. Une bizarrerie qui évoque la conception optique des grands télescopes actuels !

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1er décembre 2017

Migration makes breeding harder for seabirds [Phys]

An international collaboration has for the first time revealed the key drivers of seabird migration. The new study suggests that puffin colonies that travel great distances during the winter often find it more difficult to breed than others, and that escaping your habitat with far flung migration therefore carries a cost.

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30 novembre 2017

Higher plant species richness may not be enough to protect ecosystems from the worst impacts of climate extremes [Phys]

Studies on mild fluctuations in weather have provided support for the idea that higher biodiversity results in more stable functioning of ecosystems, but critical appraisal of the evidence from extreme event studies is lacking.
Higher plant species richness is not always sufficient to reduce ecosystem vulnerability to climate extremes, as shown in a comprehensive literature analysis published today in the Journal of Ecology.

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30 novembre 2017

Theory of the evolution of sexes tested with algae [Phys]

The varied sex lives of a type of green algae have enabled a University of Adelaide researcher to test a theory of why there are males and females.

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