NASA's chief scientist Dr Jim Green is optimistic that the next rovers to visit Mars will find evidence of alien life.
Some of the things that make the Moon inhospitable could also be helping to preserve evidence of ET.
It may be possible to detect signs of extraterrestrial life on a distant world by picking up its biofluorescence.
Amusing archive footage has highlighted how attitudes on the topic of alien life have changed over the years.
In the United States, there are almost as many believers in intelligent alien life as there are believers in God.
An international group of scientists met in Paris last week to discuss why we have yet to encounter alien life.
Scientists have synthesized a molecular system that hints at a possible alternative to DNA-based life.
In a new study, scientists have highlighted the possibility of finding life around the nearest single star to the Sun.
A scientist with NASA's Intelligent Systems Division believes that our idea of alien life is too narrow.
Scientists behind the ExoMars mission have picked out a landing site where they hope to find evidence of alien life.
According to a new paper, a thriving extraterrestrial world could be predominantly purple rather than green.
A new report has suggested that searching for evidence of alien life should be part of all future space missions.
NASA is investigating the possibility of sending a probe to Mars that could directly seek out alien life forms.
An extrasolar world 500 light years away could be the most promising place yet to look for alien life.
Researchers at Oxford University maintain that we are probably the only intelligent life forms in the universe.
A new theory has put forward the possibility that killer robots have wiped out all intelligent alien life.
The European Space Agency's Trace Gas Orbiter will be starting its mission within the next two weeks.
A lack of phosphorus in the universe could mean that Earth-type life is a lot rarer than commonly thought.
Geomicrobiologist Barry DiGregorio maintains that the Curiosity rover has found evidence of alien life forms.
New laboratory experiments have added support to the idea that microbes could be living on Saturn's icy moon.