Physicists have finally confirmed a phenomenon that sounds like pure science fiction: waves that appear to bounce off a sudden change in time rather than a surface in space. The effect, known as a ...

While the concept of time travel has long captured public imagination, modern physics actually approaches time in a much more subtle manner. Instead of moving people or objects through history, ...

FIRST LOVE AND LAST—Howard Coxe— Harcourt, Brace ($2). Time, measured by minutes or months, seconds or centuries, is as trickily undefinable as electricity. Author Howard Coxe’s well-told tale ...

Traveling backwards in time has been the focus of several space films over the decades. As our collective understanding of how the universe works expands, new revelations are made nearly every day.