At some point they will be travelling so fast that the way they bond will be affected by Albert Einstein's theory of relativity, which departs from classical theories at speeds close to that of light.
Earlier this year Hawking he said that a spaceship capable of travelling through time - but only forwards - would breach Albert Einstein's theories of relativity.
今年早些时候霍金曾表示，开发出能穿越时间旅行的飞船（顺势）将打破爱因斯坦的相对论理论。
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Earlier this year, Hawking he said that a spaceship capable of travelling through time - but only forwards - would breach Albert Einstein's theories of relativity.