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12 septembre 2017

Pollen hitches a ride on bees in all the right spots [ScienceNews]

Hard-to-groom zones line up with where flower reproductive parts touch the insects.

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12 septembre 2017

Ne dormir que d’un œil, le sommeil des cétacés [CNRS Le Journal]

Lorsque les dauphins dorment, une moitié de leur cerveau reste éveillé… Découvrez les explications scientifiques de cet étonnant phénomène grâce à ce nouveau billet du blog « Aux frontières du cerveau ».

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12 septembre 2017

Less snow from climate change pushes evolution of browner birds [ConservationBytes]

Climate changes exert selective pressures on the reproduction and survival of species. A study of tawny owls from Finland finds that the proportion of two colour morphs varies in response to the gradual decline of snowfall occurring in the boreal region.

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11 septembre 2017

Lazy ants make themselves useful in unexpected ways [Phys]

In a new paper, published in the open-access journal PLOS ONE, authors Charbonneau, Takao Sasaki of the University of Oxford and Dornhaus show for the first time that inactive ants can act as a reserve labor force. When they removed the top 20 percent of most active workers, they found that within a week, they were replaced mostly by individuals belonging to the "lazy" demographic, which stepped up and increased their activity levels to match those of the lost workers.

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8 septembre 2017

Bacterial ’aphrodisiac’ sends single-celled organism into mating frenzy [Nature]

Researchers surprised to observe bacterial protein triggering a switch from asexual to sexual behaviour.

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