2 years ago (2015-09-27 08:27:59)

Stephen Hawking's thinking on Aliens

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British physicist Stephen Hawking says aliens are out there, but it could be too dangerous for humans to interact with extraterrestrial life. In recent years he has become a prominent advocate for space travel, contending that humans must journey into the heavens and going through zero-gravity training himself.

Hawking claims in a new documentary titled "Into the Universe With Stephen Hawking" that intelligent alien life forms almost certainly exist but warns that communicating with them could be "too risky."

"We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet," Hawking said. "I imagine they might exist in massive ships ... having used up all the resources from their home planet. Such advanced aliens would perhaps become nomads, looking to conquer and colonize whatever planets they can reach."

The 68-year-old scientist said a visit by extraterrestrials to Earth might well be like Christopher Columbus arriving in the Americas, "which didn't turn out very well for the Native Americans."

He speculated that most extraterrestrial life would be similar to microbes, or small animals. Microbial life might exist far beneath the Martian surface, where liquid water is thought to trickle through the rock. Marine creatures might also conceivably live in huge oceans of water beneath a miles-thick layer of ice on Europa, a moon of Jupiter.

"If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans," he said.

Prof Hawking thinks that, rather than actively trying to communicate with extra-terrestrials, humans should do everything possible to avoid contact.

He explained: "We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet."

In the past, probes have been sent into space with engravings of human beings on board and diagrams showing the location of our planet.

Radio beams have been fired into space in the hope of reaching alien civilisations. Prof Hawking said: "To my mathematical brain, the numbers alone make thinking about aliens perfectly rational. The real challenge is to work out what aliens might actually be like."

The programme envisages numerous alien species including two-legged herbivores and yellow, lizard-like predators. But Prof Hawking conceded most life elsewhere in the universe is likely to consist of simple microbes.

British physicist Stephen Hawking says aliens are out there, but it could be too dangerous for humans to interact with extraterrestrial life.

Hawking claims in a new documentary titled "Into the Universe With Stephen Hawking" that intelligent alien life forms almost certainly exist but warns that communicating with them could be "too risky."

"We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet," Hawking said. "I imagine they might exist in massive ships ... having used up all the resources from their home planet. Such advanced aliens would perhaps become nomads, looking to conquer and colonize whatever planets they can reach."

The 68-year-old scientist said a visit by extraterrestrials to Earth might well be like Christopher Columbus arriving in the Americas, "which didn't turn out very well for the Native Americans."

He speculated that most extraterrestrial life would be similar to microbes, or small animals. Microbial life might exist far beneath the Martian surface, where liquid water is thought to trickle through the rock. Marine creatures might also conceivably live in huge oceans of water beneath a miles-thick layer of ice on Europa, a moon of Jupiter.

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