Report, if you have a problem with this page“ In Einstein's equation, time is a river. It speeds up, meanders, and slows down. The new wrinkle is it can have whirlpools and fork into two rivers. So, if the river of time can be bent into a pretzel, create whirlpools and fork into two rivers, then time travel cannot be ruled out. ”
Michio Kaku
From : Einstein's Cosmos: How Albert Einstein's Vision Transformed Our Understanding of Space and Time
