Stephen Hawking is a Physicist, cosmologist and he is a physically challenged person also. But he is a miracle boon to the human society, because he believes that human can move with time. Time travel is once considered as a SCI-FI Fantasy.

But Mr. Hawking says he could visit marlin Monroe at his concert or visit Galileo's Experiment live. And also if you want to see who built the Stonehenge, it is there. He has also informed that all physical objects exist in this world in three dimensions. Everything has its own length, breadth and height. Now there can be another kind of length i. e. length in time. We need to study the fourth dimension.

Travelling the time means travelling through the fourth dimension. As we travel on a straight way that is one dimension, going left and right is two dimensions. Going up and down is three dimensions. But what is fourth dimension. This is nothing but just a travelling through wormhole. There are some places which are separated by time not the distance and human need to crack that tiny shortcut of wormhole.