Time Travel 103

What about the world of one time and three space dimensions that we (appear to) live in? Can causality go awry in our Universe? Look at spinning black holes and a quantum-field powered wormhole for examples where propagation backwards in time can happen, at least in theory.

A spinning black hole
But how to pass back out of horizon?
Meet the worm hole
What could support a worm hole?
How would time travel work with a worm hole?
How would the rest of physics work, then?

This course offered starting next term.

Go back to Time Travel in Flatland.