Is habitation of Mars really possible?  Can it happen in our lifetime? In October 2015, NASA declared Mars "an achievable goal".

Chris Impey is a University Distinguished Professor and his research interests are observational cosmology, gravitational lensing, and the evolution and structure of galaxies.

Considering the fact that small spaces (like elevators) make me queasy and nervous I was surprised to find that Buzz Aldrin's Mission to Mars : my vision for space exploration  had me wondering if I would be willing to travel to Mars.