Alien life on Mars? 5 Curiosity Rover sightings

© Ueslei Marcelino
As a species, humans have always questioned the existence of other life forms in the universe. But while there is no concrete proof either way, this hasn’t stopped plenty of speculation.

In recent years, UFO enthusiasts have been scouring images from NASAs’ Curiosity Rover for signs of life as it roams around Mars.

We’ve gathered together some of the images that have been beamed back from the red planet to see just which signs of alien life have been “discovered”.