This study looked at how light travels through a cloud of atoms ... and how it may have the potential for traveling back in time. First off, it is important to note that the study has not yet ...

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, ...

The universe tells us its story mainly through light and other ... for the answer to get back to Earth. Those 2.6 seconds were exactly the round-trip travel time for radio waves between the ...

While time travel is cool science fiction tech, it seems to directly contradict our current understanding of physics. But what about, instead of moving a whole person back in ...

Back then, Earth was in its Pleistocene ... 300 million years after the Big Bang. Its light has been traveling for 13.5 billion years. Next time you want to see into the past, just look up.