The Shape of Time & Space (and Trains)

Sorry, sometimes I can't help myself. I am simply in awe of Einstein.


I just wanted to share the elegance of Stephen Hawking's explanation of how Einstein's theory of relativity shows that time and space are inextricable interconnected. Time is not a straight line; it doesn't move like a train along a straight set of tracks...time has a shape.
Time has a shape.
So what about time-travel? Well, it would appear that time, however we may wish it to be different on many occasions, has a one-way direction. This model is simply a way to envision the idea of curving space while involving time.
I know I'm weird. I think it's beautiful.