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

Vanderbilt University physicist Lorenzo Gavassino isn't so sure this is as big an obstacle as time-traveler pessimists have ...

It's time to stop sleeping on this 2015 SyFy hidden gem. Here's why '12 Monkeys' was great 10 years ago and great now.

One of the most famous paradoxes ever, the grandfather paradox, cautions against making changes that could break the timeline ...