Found in the semi-metal material ZrSiS, these quasiparticles are massless when moving at light speed in one direction but gain mass when slowing down in another, due to resistance within the material’s electronic structure.

This behavior, tied to Einstein’s E=mc², was unexpected and may lead to applications similar to graphene.

Researchers are now studying the unexplained quantum interactions behind this phenomenon, published in Physical Review X.

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[–] randon31415 0 points 1 day ago (1 children)

When I'm driving my car down a street - in one direction it moves without loosing much momentum, but in another direction at a 90 degree angle, my car tends to lose a lot of momentum. Also, it is impossible to move in the z-direction without having a confederate flag on the top of the car and being chased by a sheriff in the deep south.

[–] homesweethomeMrL 1 points 1 day ago

Ah. The Roscoe Theorem.