When it comes to space travel, Albert Einstein's theory of relativity is a major inconvenience. With the laws of physics ...

New data from the Atacama Cosmology Telescope has allowed astronomers to travel back in time to the dawn of the universe.

YiuCheung/Adobe If tachyon particles can travel faster than the speed of light, they could also hypothetically send messages that exceed the constraints of time. So, you could send a message back ...

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 ...