Physicists in NYC have proven “time mirrors” are real, flipping waves backward in time — a discovery that’s bending minds and reshaping future tech. “Time is not a line.

“It took a positive amount of time, but our experiment observing that photons can make atoms seem to spend a *negative* amount of time in the excited state is up!” wrote Aephraim Steinberg, a ...

Scientists studying a centuries-old mystery of physics suggest two “arrows of time” control the evolution of quantum systems. Skip to main content. Scientific American. February 26, 2025.