Astronaut Tim Peake says he believes there could be life on planets other than Earth, including on Mars.
He's been in Stevenage where he announced that the name of the new probe due to land on Mars will be named "Rosalind Franklin"
He told ITV Anglia that one of the most common questions he gets asked is 'do aliens exist?'
The Mars Rover, built by Airbus, is due to land on the red planet in 2021 to hunt for signs of alien life.
While he was on board the International Space Station Tim Peake remotely controlled a prototype of the Mars Rover
More than 30 thousand people entered the competition to name the rover with the winner revealed in Stevenage today.
The name was suggested in tribute to Rosalind Elsie Franklin, a chemist whose pioneering works has helped us understand molecular structures of DNA.
- Click below to watch our interview with Tim Peake