Considering what we know about the key ingredients for life's formation on Earth, here are three explanations for how this process may have occurred on our sister planet.
The clouds of Venus may harbour alien life. But where else?
Scientists don't claim to have evidence of life on Venus but they have ruled out pretty much everything else.
The Perseverance rover onboard Mars
2020 is our best bet for finding life on the red planet.
Pluto began hot inside, study of its surface fractures suggests
Evolution seems to lead to increasing complexity of species. But perhaps a dominant, intelligent species like humans will always end up destroying itself.
New research expands the pool of habitable worlds to include super-Earths with hydrogen-rich atmospheres.
The Earth may be crawling with undiscovered creatures with a different biochemistry to life as we know it.
From alien life to human spaceflight, 2020 may deliver some exciting news.
Scientists can't expect the unexpected if they're not open-minded about how their theories might be wrong.
New research shows how rock features that look like fossilised microbes can form without life.
Humans evolved through a series of highly unlikely events – so finding another intelligence like us would be like winning the lottery many times over.
Musk's plans have potentially dire consequences for alien life, astronauts and the environment.
K2-18 b is now the exoplanet most likely to be habitable.
NASA's Europa Clipper mission just got the green light - here's what it could achieve.
Listen up, conspiracy theorists – it is virtually impossible that there could be alien visitors on Earth.
As more than a million people have indicated plans to partake in a citizen 'raid' on the famed Area 51 to 'see them aliens,' a scholar on the search for extraterrestrial life weighs in on the hype.
Rovers including 'Rosalind Franklin' will pick up where Opportunity left off – trying to answer the question of whether there is, or ever has been, life on Mars.
We will never see 'Oumuamua again, and we may never know exactly what it is. But with the right kind of media coverage it could inspire some kids to take up a career in science.
Studies from our own planet shed light on whether there could be life in a subglacial lake on Mars.