Time travel has been a popular science-fiction theme since H. G. Wells wrote his celebrated novel The Time Machine in 1895. But can it really be done? Is it possible to build a machine that would ...

As the narrator says, the laws of physics don’t explicitly forbid time travel, but that doesn’t mean we’ll be building a working time machine anytime soon that can let us whip back and forth ...

After decades of working on theories about time travel, astrophysicist Ron Mallett says he knows how to build a time machine.

It’s just a matter of time before we build a time machine that can take us into the far future, scientists say. Here’s what we know so far about the science.

Astrophysicist Ron Mallett believes he's figured out how to build a time machine that would allow someone to travel to the past.

“In order to travel back in time, the spacetime structure must be engineered appropriately,” explains Prof. Ori. “This is what Einstein’s theory of general relativity deals with.

Einstein’s theory says that if you want to slow time down – essentially, to time travel – you need to move fast, very fast! Imagine setting off on a mission from Earth in the year 2000, for ...

Tipler published a paper on how to build a time machine, a Tipler Cylinder, back in 1974. This machine would enable you to travel back in time.

Time travel has been a popular science-fiction theme since H. G. Wells wrote his celebrated novel The Time Machine in 1895. But can it really be done? Is it possible to build a machine that would ...

Tipler published a paper on how to build a time machine, a Tipler Cylinder, back in 1974. This machine would enable you to travel back in time.

Tipler published a paper on how to build a time machine, a Tipler Cylinder, back in 1974. This machine would enable you to travel back in time.