What are challenges in getting to Mars and how were they overcome in the book?

Question

like what was difficulut for NASA to send another time to Mars for Mark and how did they work around it

Asked by tyanna s #960363 on 12/9/2019 1:39 AM

Last updated by jill d #170087 on 12/9/2019 2:36 PM

Answered by jill d #170087 on 12/9/2019 2:36 PM

You are referring to NASA sending back a rescue team?