Nostalgia is a very strong emotion. Whenever something reminds us of a lost time, we gravitate in that direction towards the past to indulge in a moment of reminiscing. Yes, when it comes to making a ...

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

Scientists have taken one more step down the very long road to time travel. A new paper combines the Alcubierre “warp” drive with the idea of “controlled closed timelike curves.” Though far out, ...