CANADA-SCIENCE-PHYSICS-TIME

Experimental physicist Daniela Angulo is seen amongst an apparatus in the physics lab at University of Toronto, a lab Angulo uses to study the behaviour of lasers and atoms, in Toronto, Friday, October 25, 2024. Scientists have long known that light can sometimes appear to exit a material before entering it -- an effect dismissed as an illusion caused by how waves are distorted by matter. Now, researchers at the University of Toronto, through innovative quantum experiments, have demonstrated that "negative time" isn't just a theoretical idea -- it exists in a tangible, physical sense, deserving closer scrutiny. (Photo by Cole BURSTON / AFP) (Photo by COLE BURSTON/AFP via Getty Images)