British astrophysicist Stephen Hawking says aliens are out there, but it could be too dangerous for humans to interact with extraterrestrial life.
Professor Hawking claims in a new documentary that intelligent alien lifeforms almost certainly exist, but warns that communicating with them could be "too risky".
With the universe made up of some 100 billion galaxies each containing hundreds of millions of stars, it was unlikely the Earth was the only place where life has evolved.
"To my mathematical brain, the numbers alone make thinking about aliens perfectly rational," he said.
"The real challenge is to work out what aliens might actually be like."
The 68-year-old scientist says a visit by extraterrestrials to Earth would be like Christopher Columbus arriving in the Americas, "which didn't turn out very well for the Native Americans".
"We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet," he said.
Monday, April 26, 2010
Stephen Hawking: Aliens are out there and they could kick our ass.
Maybe probing is their way of shaking hands? From News.com.au: