Stephen Hawking's new documentary premiered Sunday night on the Discovery Channel. In it, he claimed that intelligent alien life almost certainly exists and that the search for it is valuable. He also suggested that the potential threats posed by contact with alien intelligence should discourage us from actively sending out messages to the cosmos.

As anyone who has seen the Discovery Channel broadcast knows, it did an excellent job of explaining astrobiology and the search for extraterrestrial intelligence. It illustrated how vast the search is (and will become) and its potential impact on Earth's inhabitants.

Yes, in my opinion.  But only if their (the ETs) actions warrant it.

For example. If there is any reality whatsoever to the alien abduction phenomenon reported throughout the world, then I would think that ample reason to fear an ET presence on Earth.  Conversely, if the abduction phenomenon is real, but not alien in origin, then that would be ample reason to fear rogue powers here on Earth. To read the rest of the article, click here.