Interesting link at the end of the article about a mini helicopter NASA's sending along with the Mars 2020 mission - https://www.nytimes.com/2018/05/11/science/

Interesting link at the end of the article about a mini helicopter NASA's sending along with the Mars 2020 mission - https://www.nytimes.com/2018/05/11/science/mars-helicopter-nasa.html https://www.nytimes.com/2018/05/11/science/mars-helicopter-n...