We have seen particles which are massless solely in a single path

Unusual particles which have mass when transferring one path however no mass when transferring in one other have been first theorised greater than a decade in the past. Now, these mass-shifting particles have been glimpsed in a semimetal uncovered to excessive circumstances.

“This [particle] is very bizarre. You can imagine walking on the streets of New York and if you go straight, you are super light, you are massless. But turn 90 degrees east or west, and you become super massive,” says …