In 1998, a gentleman by the name of John Titor arrived from the future, or so he said. In his timeline, as he claimed, General Electric had managed to invent time travel in the year 2034. He even ...

The curious minds at What If investigate whether John Titor was really a time traveler from the future, exploring evidence, ...

From utopian dreams to dystopian warnings, time travel fiction reflects our hopes and fears for humanity’s future. Courtesy the publishers For decades, authors and readers have been asking questions ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of ...