The world's most comprehensive hunt for intelligent extraterrestrials is about to begin its next major phase.
ESA's Trace Gas Orbiter has started its mission to seek out traces of biologically-produced methane on Mars.
On planets more massive than the Earth, launching things in to space will be a lot more challenging.
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.
A new paper has put forward the suggestion that the clouds of Venus could be a habitat for microbial life.
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.
Two astrophysicists have warned that malicious aliens could send us a message infected with a virus.
Dr. Michio Kaku maintains that contact with an alien civilization will happen before the century is out.
Scientists have discovered microbial life rebounding in one of the driest and most inhospitable places on Earth.
Researchers believe that humanity would be more likely to welcome than fear the discovery of alien life.
It is looking increasingly likely that the Trappist-1 system's seven worlds could be home to alien life.
A lack of carbon monoxide on a methane-rich world could indicate the presence of extraterrestrial life.
The Mars Curiosity rover has discovered some rather peculiar structures and nobody knows what they are.
Astronomers believe that they have finally solved the mystery of Tabby's Star's unusual dimming behavior.
A radio astronomer at MIT may have an explanation for why we have yet to be contacted by aliens.
Scientists have identified a diverse group of organisms within fossils dating back 3.45 billion years.
An asteroid thought to have come from another solar system is to be checked for signs of alien technology.
Cosmonaut Anton Shkaplerov has indicated that bacteria found on the space station could have come from space.