Putting astronauts into a 'deep sleep' would make reaching the red planet easier and cheaper

http://www.dailymail.co.uk/sciencetech/article-2782148/Is-human-HIBERNATION-key-getting-Mars-Putting-astronauts-deep-sleep-make-reaching-red-planet-easier-cheaper.html

Also See
http://marsandmercury.blogspot.com/