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23 mars 2017

New cave catfish threatened by deforestation, mining, pollution [Mongabay]

Researchers say a unique catfish species recently discovered in caves in central Brazil should be listed as Endangered.

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23 mars 2017

Using the placenta to understand how complex organs evolve [The Conversation]

To gain insight into how new organs come to be, my colleague and I decided to focus on one that’s more recently evolved – the placenta. It’s a complex organ that has evolved many times independently. In modern animals we see species with no placenta, species with a complex placenta and myriad species between these extremes.

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23 mars 2017

Female fish with bigger brains choose better mates [New Scientist]

It takes brains to choose a good partner. In one of the first experiments to look at the cognitive demands of choosing a mate, female guppies with big brains showed a preference for more colourful males, while those with smaller brains showed no preference.

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22 mars 2017

Des lacs moins profonds qu’on ne le pensait [Sciences et Avenir - Nature & Environnement]

Des analyses mathématiques indiquent que la profondeur des lacs dans le monde est, en moyenne, bien plus faible qu’estimé. Leur contribution au réchauffement climatique serait par conséquent mal appréhendée.

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22 mars 2017

Birds of play demonstrate the infectious power of emotion [Nature]

New Zealand parrots provide the latest support for a popular theory of crowd behaviour.

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