How can we go into past
Answers
It turns out that people time travel all the time, but only in one direction: from the past to the present. And, as we experience our lives here on Earth, we are constantly moving into the future. Unfortunately, no one has any control over how quickly that time passes and nobody can stop time and continue to live.
This is all right and proper, and fits with Einstein's theory of relativity: time only flows in one direction—forward. If time flowed the other way, people would remember the future instead of the past. So, on the face of it, traveling into the past seems to be a violation of the laws of physics. But not so fast! There are theoretical considerations to take into account if somebody wants to build a time machine that goes back to the past. They involve exotic gateways called wormholes (or the creation of such gateways using a technology not yet available to science).