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![Quand les écosystèmes saturent [CNRS Le Journal]](local/cache-vignettes/L120xH90/arton9402-00d1e.jpg?1524817610 "Quand les écosystèmes saturent [CNRS Le Journal]")
20 septembre 2017
La prolifération des algues vertes sur certaines plages bretonnes témoigne d’un phénomène de pollution en pleine recrudescence sur la planète : l’eutrophisation. Une expertise scientifique est publiée aujourd’hui pour faire la lumière sur les origines et les conséquences de ce syndrome d’indigestion des milieux naturels.
![Secrets of butterfly wing patterns revealed by gene hacking [New Scientist]](local/cache-vignettes/L120xH90/arton9388-e67f5.jpg?1524817610 "Secrets of butterfly wing patterns revealed by gene hacking [New Scientist]")
19 septembre 2017
Butterfly wings have been given make-overs by scientists who tweaked a “painting gene” to change their patterns and colours.
The research has major implications for understanding how the so-called “rules of life” – genetics and evolution – shape biodiversity.
![The Same Pesticides Linked to Bee Declines Might Also Threaten Birds [Audubon]](local/cache-vignettes/L120xH90/arton9376-7188c.jpg?1524817610 "The Same Pesticides Linked to Bee Declines Might Also Threaten Birds [Audubon]")
19 septembre 2017
Neonicotinoids are washing off of their host seeds and into water bodies—threatening not just aquatic insects but the birds that rely on them.
![Scientists show molecular basis for ants acting as 'bodyguards' for plants [Phys]](local/cache-vignettes/L120xH90/arton9374-059bd.jpg?1524817610 "Scientists show molecular basis for ants acting as 'bodyguards' for plants [Phys]")
19 septembre 2017
Though you might not think of ants as formidable bodyguards, some do an impressive job protecting plants from enemies. Now, scientists at the University of Toronto (U of T) have determined what makes some better bodyguards than others.
![Sex and aggression linked in male mouse brains but not in female [New Scientist]](local/cache-vignettes/L120xH90/arton9372-0c0d7.jpg?1524817610 "Sex and aggression linked in male mouse brains but not in female [New Scientist]")
19 septembre 2017
Aggression and sexual behaviour are controlled by the same brain cells in male mice – but not in females. The finding suggests that males are more likely to become aggressive when they see a potential mate than females.
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