A continuum model is developed to analyze the stability of finite-size coherent structures in suspensions of strongly aligned swimmers. For dilute active jets, pullers undergo pearling instabilities w...

Using phototaxis to control cell orientation, various instabilities can be induced in jets of motile microalgae.

The concept of an “energy transition” is misleading, states the CNRS science historian Jean-Baptiste Fressoz. He explains why coal and oil never replaced wood, and that the fight against climate chang...