One of the most famous paradoxes ever, the grandfather paradox, cautions against making changes that could break the timeline if you were to ever travel back in time. But, according to one scientist, ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed ...

A laboratory prototype of a plasma electric rocket engine based on a magnetic plasma accelerator has been produced by Rosatom ...

"Chemical rockets that we use today, even with the extra speed boost from flying by planets, or from swinging by the sun for ...

The Successful Time Travel Experiments using Kozyrev Mirrors In December 1990, in a remote village above the Arctic Circle, ...

Researchers put a sensor at the entrance of beehives to register each time the pollinators entered or exited, and how long ...

Once a year, the Large Hadron Collider smashes lead ions. But how do scientists get a heavy metal into a particle accelerator ...

"Energy is power [multiplied by] time — so to get a given amount of ... Most theoretical studies on "beam riders" for interstellar travel have focused on laser beams, which are composed of ...