Stephen Hawking and a Russian Billionaire Want to Build an Interstellar Starship

Last year, the search for extraterrestrial intelligence got a major boost when Russian billionaire Yuri Milner unveiled a $100 million effort to scan the skies for radio and light signals emitted by aliens. Not content to simply sit tight and wait for ET to hail us, Milner now plans to build interstellar spacecraft.…

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Mysterious Wow! Signal Came From Comets, Not Aliens, Claims Scientist

In 1977, astronomer Jerry R. Ehman observed a data signal so unique he drew a red circle around it and wrote “Wow!” to emphasize the discovery. The source of the signal was never identified, leading some to say it was aliens. But a new study suggests it wasn’t aliens at all—but rather a hydrogen cloud caused by comets.

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