Pupils of the Ecole Vivalys elementary school put on their spacesuit costume during their project "Mission to Mars" in Lausanne, on March 17, 2021. - While the world for the past month has been riveted by the escapades of the Perseverence Mars rover, a group of Swiss fourth-graders has been making final preparations for their own mission to the red planet. (Photo by STEFAN WERMUTH / AFP)