4 ms·Physicists Find Particle That Only Has Mass When Moving in One Direction4 points by amichail 2y agognabgib 2y agoDiscussion (16 points, 2 days ago, 7 comments) https://news.ycombinator.com/item?id=42400179 https://news.ycombinator.com/item?id=42400179rolph 2y agoquasiparticle, in a crystal lattice.