Is Humanity Unusual In The Cosmos?
Commentator Adam Frank talks with Harvard astrophysicist Avi Loeb about exo-civilizations, techno-signatures, and the search for alien life — living or long-gone.
intelligent life
Intelligent Life In Our Galaxy? Stephen Hawking Says 'We Must Know'
The British cosmologist's new $100 million search for alien life will explore 10 times more sky than previous projects.