What will it take to get humans to Mars? Science writer Andrew Fazekas sits down with two Mars experts, Jedidah Isler and Ray Arvidson, to talk about the challenges we face getting to and establishing a permanent settlement on the red planet.

Having helped design the Mars rovers Spirit, Opportunity, and Curiosity, NASA engineer Kobie Boykins reveals what these robots are telling us about the existence of life on the red planet.