Swirlonic super particles baffle physicists

In recent years, active, self-propelled particles have received growing interest amongst the scientific community. The 'swirlon' - a novel state of active matter - displayed a stunning behavior whereby instead of moving with acceleration, the quasi-particle groups moved with a constant velocity, proportional to the applied force and in the same direction of the force. This conduct seemingly violates the Second Newton's Law, currently taught in secondary schools.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/02/210211144338.htm