D uring cytokinesis, the two daughter cells begin separating from each other through constriction of an actomyosin ring. The cells then remain connected via a narrow cytoplasmic intercellular bridge for several hours while the membrane is remodeled at the fi ssion site. Only then can they part ways. Arnaud Echard wants to know how cytokinesis is achieved and regulated. By leveraging his backgro...

Affiliations: University Hospital, Hôpital Arnaud de Villeneuve, Dept of Respiratory Diseases, Montpellier, Inserm, CESP Centre for research in Epidemiology and Population Health, U1018, Respiratory and Environmental Epidemiology team, Villejuif, Inserm U1046, Montpellier University 1 and 2, Montpellier, and Allergy Division, Pneumology Dept, INSERM U657, Hôpital Arnaud de Villeneuve, Universit...

Recensé : Arnaud Dubois, La vie chromatique des objets. Une anthropologie de la couleur l’art contemporain, Turnhout, Brepols, 2019 (« Techne »), 260 p.

Affiliations: Dept of Respiratory Diseases, University Hospital, Hôpital Arnaud de Villeneuve, Montpellier, France. Inserm, CESP Centre for Research in Epidemiology and Population Health, U1018, Respiratory and Environmental Epidemiology Team, Villejuif, France. Inserm U1046, Montpellier University 1 and 2, Montpellier, France. Allergy Division, Dept of Pneumology, Inserm U657, Hôpital Arnaud d...

Marie Arnaud discusses how underground time-lapse photography can be used to measure root dynamics in coastal wetlands.

We prove the existence of quadratic polynomials having a Julia set with positive Lebesgue measure. We find such examples with a Cremer fixed point, with a Siegel disk, or with infinitely many satellite renormalizations.