Tariq Malik
Senior Editor
SPACE.com


April 23, Yahoo

Alien life may well exist in a primitive form somewhere in our corner of the galaxy, famed astrophysicist Stephen Hawking said Monday.

Given the size of the universe, it is unlikely that Earth is the only planet to develop some sort of life, Hawking told an audience at George Washington University in Washington, D.C. He added that humanity must embrace space exploration, if only to ensure its long-term survival.

"While there may be primitive life in our region of the galaxy, there don't seem to be any advanced intelligent beings," said Hawking during a lecture as part of a series commemorating NASA's 50th anniversary this year.

The lack of success by the Search for Extra-Terrestrial Intelligence (SETI) project to discover signals from an alien civilization suggests that none exist within several 100 light-years of Earth, Hawking said, though he offered three theories on the dearth of interplanetary communications.

The probability of primitive life developing on a suitable planet may be extremely low, or it may be high, but aliens intelligent enough to beam signals into space may also be smart enough to build civilization-destroying weapons like nuclear bombs, he said. More likely, he added, is that primitive life is likely to develop, but intelligent life as we know it is exceedingly rare.

"We don't appear to have been visited by aliens," Hawking said, adding that he discounts reports of UFOs. "Why would they only appear to cranks and weirdoes?"

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photo: Professor Stephen Hawking gives a lecture entitled 'Why We Should Go Into Space' during the 50 Years of NASA lecture series at George Washington University in Washington, DC. Hawking called Monday for a new era of space conquest akin to Christopher Columbus' discovery of the new world. (AFP/Jim Watson)