Some scientists believe that life is likely to develop elsewhere in much the same way as it has on Earth.
Charles Bolden made the light-hearted remarks after being questioned by a ten-year-old on Sky News.
The legendary astronomer believes that it would be 'silly' to try sending messages in to space.
Could a patient who awakens during surgery later believe that they had been abducted by aliens ?
A new survey has revealed that more people in Britain believe in aliens and the paranormal than in God.
The Pope has stated that the doors of the church are open to everyone - including extraterrestrials.
The former United States president talked about the controversial subject on Jimmy Kimmel Live.
A bizarre news report from Iran's Fars News Agency has claimed that America is run by extraterrestrials.
The former Canadian defense minister has detailed his unorthodox beliefs in a recent TV interview.
Geologist Nitish Priyadarshi has identified some unusual rock carvings near a small Indian village.
Several leading astronomers believe that the first aliens we encounter will likely be robotic in nature.
A continuous message beacon aimed at contacting aliens is being hailed and criticized in equal measure.
Police in Ohio have reported an incident in which a man lost his car following an encounter with aliens.
Hollywood movies involving UFOs and aliens could have a direct effect on the number of real-life reports.
An effort to listen out for intelligent aliens in the direction of stars with planets has drawn a blank.
A former Pentagon consultant has claimed that Eisenhower attended secret meetings.
Volunteers are being recruited to help look through thousands of images of the moon's surface.
If intelligent alien life were to be discovered, what impact would this have on religion ?
A somewhat dubious photograph has surfaced online showing two alleged "aliens" on Ilkley Moor.
Astronomers have been quick to point out lately that contact with aliens could lead to our destruction.