Charles Bolden has commented on what would happen if NASA encountered an extraterrestrial life form.
Scientists studying the ageing of dogs have come up with a possible new way to increase their lifespan.
Astronomers have been left puzzled by a star that appears to have an unexplained mass orbiting around it.
Professor Stephen Hawking has warned that hostile extraterrestrials could pose a threat to the Earth.
The new mission will attempt a potentially world-saving maneuver by redirecting an asteroid's trajectory.
A new international poll has revealed that most people believe that there is alien life in the universe.
A 78-year-old in Hermitage has been fined after using spotlights and tin foil to deter extraterrestrials.
Researchers across the country have been attempting to come up with a message to send in to space.
Astrophysicists are hoping to one day track the spread of life from one star system to another.
Apollo 14 astronaut Edgar Mitchell believes that visitors from space may have prevented armageddon.
Professor Matthew Bailes has advised against attempting to correspond with an extraterrestrial race.
A new $100 million endeavor has been launched to look for signs of intelligent extraterrestrial life.
Astrobiologists have suggested that comet 67P may be home to live extraterrestrial micro-organisms.
Some scientists believe that life is likely to develop elsewhere in much the same way as it has on Earth.
Some universes might provide conditions more favorable to the development of life than our own.
Astronomer royal Martin Rees believes that we are likely to encounter machine-based extraterrestrials.
The space agency has formed a new coalition of scientists from a wide range of different fields.
Astronomers in Australia discovered an unexpected source for a series of mysterious radio signals.
Chief scientist Ellen Stofan stated that we are likely to find evidence of alien life within 20 years.
Cosmologist Fergus Simpson believes that intelligent extraterrestrials would be much larger than we are.