Fifty years ago, scientists recovered samples of potential extraterrestrial life, but may have unintentionally destroyed it during experiments.

Sadly, this doesn't mean scientists have found – or will ever find – lichen already living on Mars. But it means that an alien colony of lichen could potentially survive Mars' harsh conditions.

NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs ...

Large carbon deposits have been found on Mars, suggesting it was once home to alien lifeforms. NASA’s Curiosity Rover ...