The Validity of Time Travel Re-examined
I guess I’ve been falling behind in my futurismic, totally missing this little gem at Scientific American: an interview with Michio Kaku, author of Hyperspace.
About 10 years ago, if you were a serious physicist talking about time travel, you’d be laughed out of the scientific establishment. People would snicker behind your back, your scientific career would be ruined, and you wouldn’t get tenure. In the last decade or so, there’s been a sea change with regards to the scientific attitude toward time travel… Originally, the burden of proof was on physicists to prove that time travel was possible. Now the burden of proof is on physicists to prove there must be a law forbidding time travel.
The interview offers a quick discussion of new approaches to Einsteins basic equations with solutions that would allow for time travel. Also has a short discussion of the “Grandfather Paradox” and currently accepted explanations of how this might fit into time travel.