"Such advanced aliens would perhaps become nomads, looking to conquer and colonise whatever planets they can reach."

“这些来自外星的高级生命体可能到处漂流，寻找并征服任何他们能到达的星球，将其变为自己的殖民地。”

It would be "too risky" to attempt to make contact with alien races, he concluded.

霍金总结道，试图和外星人取得联系“风险太大了”。

"If aliens ever visit us, I think the outcome would be much as when Christopher Columbus first landed in America, which didn’t turn out very well for the Native Americans."

“如果有一天外星人来拜访我们，我认为结局会和哥伦布登陆美洲一样，对印第安人并不是什么好事。”

The scientist said that most alien life is likely to consist of small animals or microbes in planets, stars or floating in space.

霍金说，大多数外星生命应该都是行星、恒星上或漂浮在太空中的小动物或微生物。

Hawking said it's not likely that scientists will find intelligent alien life in the next 20 years.

不过霍金表示，未来20年内，科学家不大可能寻找到有智慧的外星生命。

预言三：地球会在1000年到1万年内毁灭，人类必须尽快逃离地球，移居到其他星球。

"I don't think we will survive another 1,000 years without escaping our fragile planet." Professor Stephen Hawking has warned.

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