in my view, if there is time travel,

in my view, if there is time travel,

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送交者: pgss 于 2013-01-04, 21:19:12:

回答: Just read "“穿越”时空为什么不可能", comments about multiverse 由 silxirt 于 2013-01-04, 17:21:29:

the traveller can only observe, like an invisible ghost, but cannot communicate or change whatever is there.

the universe has to be a self consistent solution of the various physical laws, eistein equation, etc.

time travel might not be possible, or we should have at least seen - silxirt (125 bytes) 2013-01-04, 22:53:54 (698706)
你observe那里就少了些光子，你呼吸那里就少了些空气。 - whoami (73 bytes) 2013-01-04, 22:07:06 (698698)