Physicists have created a “negative mass”
Physics at the University of Washington have created a fluid with negative mass. Push it, and unlike all the physical objects in the world that we know, it will not accelerate in the direction of the push. It will accelerate in the opposite direction. This phenomenon is rarely generated in laboratory conditions and can be used to explore some of the more complex concepts about space, says Michael Forbes, associate Professor, physicist, and astronomer at the University of Washington. The study appeared in Physical Review Letters.