Time travel is the concept of moving between different points in time in a manner comparable to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the need for the traveler to experience the intervening period (at least not at the normal rate). Any technological device – whether fictional, hypothetical or actual – that would be used to achieve time travel is commonly known as a time machine.
Most of us at one time or another, and especially as children, have imagined what it would be like to travel through time either into the future or the past. There are some scientific theories that support the possiblity of travel through space and time, and evidence that explains how actual physical time travel may be possible. Some sources even suggest that there have been a few ancient civilizations from the past who understood the concepts of time travel or had been visited by time travelers. There is also some evidence to support the notion that the Government has already discovered or developed time travel and may be hiding this advanced technology from the public.
How To Time Travel How to induce a time-travel dream or time travel dream-like experience using your mind. Travel through or transcend space and time and create a deliberate time-travel experience while awake or asleep.
Some scientists theorize that time travel into the past may be possible through the use of cosmic strings, which are thin strands of high-density material left over from the early universe.
In A Briefer History of Time, Stephen Hawking says flatly, "It is possible to travel to the future. That is, relativity shows that it is possible to create a time machine that will jump you forward in time.