Smile, wave: Some exoplanets may be able to see us, too

Three decades after Cornell astronomer Carl Sagan suggested that Voyager 1 snap Earth's picture from billions of miles away—resulting in the iconic Pale Blue Dot photograph—two astronomers now offer another unique cosmic ...

An alien code close to home: Seeking ET beyond the radio silence

Any intelligent extraterrestrial life that exists probably won't announce itself by blowing up the White House, or win over the hearts of children as a lovable alien with a glowing finger. Many scientists simply hope to find ...

Is the 'fine-tuned universe' an illusion?

For decades physicists have been perplexed about why our cosmos appears to have been precisely tuned to foster intelligent life. It is widely thought that if the values of certain physical parameters, such as the masses ...

'The mind of God': top quotes from Stephen Hawking

The world-famous British theoretical physicist Stephen Hawking, who died on Wednesday at the age of 76, was known as much for his profound and witty comments as his scientific discoveries.

City lights could reveal E.T. civilization

In the search for extraterrestrial intelligence, astronomers have hunted for radio signals and ultra-short laser pulses. In a new paper, Avi Loeb (Harvard-Smithsonian Center for Astrophysics) and Edwin Turner (Princeton University) ...

New explanation postulated for Fermi paradox

(PhysOrg.com)—Enrico Fermi, the famous Italian physicist, once asked the question; if intelligent life has come to exist many times in our galaxy, why is there no sign of it? It's a clearly valid point, when you consider ...

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