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Rules for Time Travel.

Always fun, although I have a couple of issues with the rules:

Rule Zero: No Paradoxes, because, according to the author, no true paradoxes can exist in the real world, only as concepts.  Someone tell that to the pre-observationally equally alive and dead Shrodinger’s Cat. (dealt with later in Rule 9: Parallel Universes…but I still think quantum superposition negates this rule)

Rule Five: Black Holes ≠ Time Machines, but wormholes could be. (Correct) Unfortunately no one knows how to make negative energy to keep them open (Incorrect).  We can’t manufacture Negative energy in sufficient quantities to make working wormholes…but we can make tiny amounts through the Casimir effect)

The article is still fun though.  If you like “Lost” you’ll recognize Rule 6: Whatever happened, happened (note: read that in the whispery nerd voice of Daniel Faraday)

(Sweet article from awesome science blog: Cosmic Variance)

**UPDATE**

If you ARE going to travel back in time, and you don’t mind creating a messed-up parallel universe, this might come in handy

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