SOURCES
https://commons.wikimedia.org/wiki/File:Mars-manned-mission-NASA-V5.jpg
//www.factretriever.com/mars-factshttp:https://en.wikipedia.org/wiki/Mars
https://solarsystem.nasa.gov/planets/mars
https://lightyears.blogs.cnn.com/2012/10/20/exploring-space-whys-it-so-important
https://nssdc.gsfc.nasa.gov/planetary/chronology_mars.html
Work log -https://drive.google.com/a/pequeavalley.net/file/d/0B9jb4j8pIitrdHh6bzFYQ3djdTA/view?usp=sharing