Scientists have made a satisfying and intriguing physics discovery some 16 years after it was first predicted to be a possibility: a quasiparticle (a group of particles behaving as one) that only has ...

The particles are either all energy or have mass depending on the direction of their movement along the material’s ‘tracks.’” The researchers originally set out to study the quantum interactions in ...

UNIVERSITY PARK, Pa. — For the first time, scientists have observed a collection of particles, also known as a quasiparticle, that's massless when moving one direction but has mass in the other ...

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

Planck photon rocket drives --- which in theory could hit velocities equal to 99.999 percent the speed of light --- might eventually offer propulsion engineers a way to drastically reduce interstellar ...

Physicists have spent decades treating mass as something the universe simply hands to particles, a property encoded in equations rather than explained from first principles. A new proposal argues that ...