To understand how Star-Lord flies, you have to consider both the forces acting on him (hello, jet boots) and the torque.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Active matter: this microscope image shows part of a cluster of self-propelled particles, colour-coded according to their distance from the centre. (Courtesy: Jie Zhang, Ricard Alert, Jing Yan, Ned S ...