Mars Sample Return

Landing on mars is already a very, very ficult thing to be able to do. So even landing a rover, and bearing in mind that curiosity and severance ar robots the size of a car, perseverance is over a ton in masses. It was a very,very difficult thing for venassa to pull off. But trying to mar sample return of sending a mission to mars to land safely to pick up samples and then launch all the way back to the earth, is a lot more difficult than,. twice as difficult as just landing on mars in the first place.