时间旅行isn't a weapon, necessarily, but neither is a B-52 Stratofortress. The latter is a bomber, a delivery system for weapons. Likewise, if our future operates the way it did in the Terminator films, we might use time travel to assassinate future military leaders before they rise to power. Or perhaps we'll actually wage full-blown wars across four dimensions, such as the Time War waged between the Time Lords and the Daleks of TV's "Doctor Who."
实时旅行比电影引导我们相信的要棘手要棘手,但这属于物理定律。爱因斯坦(Einstein)告诉我们,当您接近光速时,时间会减慢或视觉上的思考,延伸,延伸。您只需要一个飞机注意效果。在著名的实验中,物理学家同步了五个原子ic clocks然后,将一个放在地面上,其余的将两个非常快的飞机(一个向东行驶,另一个向西)。飞机降落后,其时钟的测量时间比地面时钟少。差异是数十亿纳秒[来源:中殿]。如果时钟是人,飞机时钟将比地面时钟年轻。
当然,纳秒不感兴趣我们。我们想像孩子或老年人一样见面。严重的时间旅行需要超过飞机。它要求我们与black holes, wormholes or cosmic strings, all of which we're still studying as phenomena.
We can't really say whether we'll ever be able to instantly go forward or back in years (except by aging), but the physical framework is real enough for it to make our list.
接下来,我们将玩更多物理学。