Scientists are trying to figure out if time travel is even theoretically possible. If it is, it looks like it would take a whole lot more knowledge and resources than humans have now to do it.

Researchers have discovered that it’s possible to speed up, slow down, or reverse the flow of time in a quantum system. This ...

The science: Is time travel possible? Up until recently, physicists believed that time travel to the past was impossible because it required unusual matter or extreme warping of spacetime.

A scientist has mathematically proven the physical feasibility of paradox-free time travel. But once you go back, you might not like what you find.

Physicist Michio Kaku says new CERN experiments suggest time travel could be possible. Also, Wisconsin Gov. Scott Walker talks with WSJ editorial board members about how his state is outcompeting ...

Ronald Mallett, professor emeritus at the University of Connecticut, is most known for his theory on how time travel is possible.

ABC: Is time travel possible? Dr. Tyson: We have ways of moving into the future. That is to have time tick more slowly for you than others, who you return to later on.