In a discovery that challenges conventional optics, scientists have managed to make a laser beam cast its own shadow—a feat previously thought impossible, as light typically passes through other light ...

Neutrino lasers: It’s an idea that many physicists didn’t see coming. At first glance, physics suggests that it would be impossible to make a laser of neutrinos, famously elusive subatomic particles.

Fusion startups are racing to prove that they can bottle the power of the stars without the sprawling magnets or precision particle beams that defined earlier generations of reactors. Instead of ...