It’s long been accepted that the smoother the surface, the lower the aerodynamic drag. That turns out not always to be the case.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. By minimizing air resistance. Friction between ski and snow is very ...

Researchers at the University of Konstanz have uncovered a new mechanism of sliding friction: resistance to motion that arises without any mechanical contact, driven purely by collective magnetic ...