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U.K. astronomer Martin Rees says that in future, some people may decide to leave Earth in order to live on other worlds. Finally, he added, they might use high technologies to change themselves to adapt to their new environment.

“They will find themselves ill-adapted to conditions there, so they will redesign themselves using powerful genetic engineering (基因工程) technologies,” Rees says. “These techniques will, I hope, be kept under control on Earth; but those on other planets will be freer to try.”

“We should surely wish them luck in changing their children to adapt to outer planets. This may be the first step towards the development of a new species,” says Rees. He says that these “post-humans” could one day turn into “fully inorganic intelligences” which may not even need an atmosphere to live and may grow well in zero-gravity environments, which ordinary people are not adapted to. “So it is in deep space, not on Earth, that ‘brains’ may develop powers that humans can’t even imagine,” says Rees.

Rees also warns that human beings shouldn’t fall back on the idea that they can avoid disaster on Earth by heading deeper into space. “It’s dangerous to think that space offers an escape from Earth’s problems,” he says. “We must solve them here. Dealing with climate change is a doddle compared with changing other planets; there’s no environment in our solar system as mild as even the top of Qomolangma.”

This isn't the first time Rees has made interesting predictions. Last year, Rees predicted possible dangers of nuclear physics (核物理学) tests taking place on Earth. “Maybe a black hole could form, and then take in everything around it,” he said. However, some scientists were not worried about this prediction. Stefan, a physicist, said he wouldn't be “losing any sleep” over that prediction.

1.What might be Rees’s prediction?

A.People might live on other planets soon.

B.Space technologies might be improved greatly.

C.People might avoid using genetic technology in outer space.

D.Space exploration might lead to genetically-changed humans.

2.Which of the following might be a description of “post-humans” ?

A.They have better survivability.

B.They are sensitive to zero gravity.

C.They are as smart as ordinary people.

D.They cannot adapt to the global environment.

3.What might the underlined part “a doddle” Paragraph 4 mean?

A.The top dog. B.A hot potato.

C.A piece of cake. D.A white elephant.

4.What did Stefan think of Rees’s prediction?

A.It was doubtful.

B.It made great sense.

C.It required special attention.

D.It questioned many popular beliefs.

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