Friday, July 15, 2005

I knew you were going to say that

Gravity doughnut promises time machine - Movement into the past gets one step less improbable.

To be perfectly honest, I have always considered Bigfoot and the Loch Ness Monster more probable than time machines or time travel. At least these don't involve grandfather paradoxes. But, in physics, you have to look at what the evidence says, and be prepared to disregard all your old prejudices.

In this case, it appears that the evidence is weighing more heavily toward honest time-travel. This is the quick summary of the story. A recent paper shows that according to Einstein's Theory of General Relativity, the building blocks for a 'time-machine', are a lot more simple and attainable than previously thought. Not that we are going to be able to build one soon. It might be possible to investigate it in astrophysical circumstances.

On the note of time travel, some recent work involving resolution of time-travel paradoxes involving quantum mechanics.

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