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Time travel to the future is arguably possible due to the phenomenon of time dilation. The possibility of backwards time travel is currently unknown, though it could occur by travelling faster than light or using black holes or wormholes.

en.wikipedia.org/wiki/Time_travel

Time travel is the concept of movement between certain points in time, analogous to movement .... Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of ...

spaceplace.nasa.gov/review/dr-marc-space/time-travel.html

Time travel is one of my favorite topics! I wrote some time travel stories in junior high school that used a machine of my own invention to travel backwards in time,  ...

www.physics.org/article-questions.asp?id=131

Travelling forwards in time is surprisingly easy. Einstein's special theory of relativity, developed in 1905, shows that time passes at different rates for people who ...

medium.com/starts-with-a-bang/is-time-travel-possible-according-to-science-ef30829365c6

May 5, 2017 ... Have you ever dreamed of traveling through time? Not at the standard, “boring” rate that we normally do — at one second per second — but ...

www.forbes.com/sites/startswithabang/2017/04/28/is-time-travel-possible-according-to-science

Apr 28, 2017 ... Traveling forward through time is inevitable, but is there any way to control it?

www.newsweek.com/time-travel-physics-einstein-spacetime-tardis-592908

May 2, 2017 ... People think of time travel as something fictional. But, mathematically, it is possible.”

bigthink.com/dr-kakus-universe/is-time-travel-possible-part-ii

As we mentioned in a previous post, Einstein himself was worried about the possibility that time travel was built into his General Theory of Relativity. In 1949 ...

www.foxnews.com/science/2016/11/29/time-travellers-could-use-parallel-dimensions-to-visit-past-scientists-claim.html

Nov 29, 2016 ... Some scientists say time travel is possible. There are multiple timelines playing out in parallel universes, according to a team of researchers.

futurism.com/new-research-shows-that-time-travel-is-mathematically-possible

Apr 28, 2017 ... Physicists have developed a new mathematical model that shows how time travel is theoretically possible. They used Einstein's Theory of ...