A machine to send objects into the past is not the cleanest modern evidence with regard to the physical reality of time travel. It is a laboratory illusion which causes waves to act as though part of ...

Time travel has shifted from pure fantasy to a serious, if highly constrained, topic in modern physics. The equations that describe gravity, quantum fields and the structure of spacetime now allow ...

Add Yahoo as a preferred source to see more of our stories on Google. If traveling into the past is possible, one way to do it might be sending people through tunnels in space. by raggio5 via Pixabay ...

Cosmic strings are artifacts of what the universe looked like in the moments before it rapidly changed from a high-energy to low-energy environment—the Big Bang. Today, scientists believe cosmic ...

A trip through time has always sparked curiosity. The idea that you could step into a machine and emerge in the past or future has captured human imagination for generations. While science fiction ...

This is an example of time dilation, a consequence of the idea that time and space are not absolute - meaning all observers do not always measure these quantities as the same. In everyday life we use ...