Your beliefs are about to change in a big way.

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

Time travel isn't exclusively a feature of the sci-fi genre, and history's greatest non-sci-fi time travel film is a classic ...

With a vastly smaller budget, 2004’s Primer tested the audience with its complicated time-travel storytelling puzzle. The ...

One of the 20th century's most remarkable underground tunnels was engineered to endure powerful earthquakes while linking two ...