Rodents and Mars

Apparently gerbils are serving as the "lab rats" to test out possible human voyage to Mars. The Russians have sent ten gerbils into space to study further the possibility of sending humans to Mars. I wonder how the gerbils feel about there new weightless environment...While they are only going to be up in space for 12 days, this can be a long time to spend with 9 other mammals in cramped living conditions. It could become "Real World" for rodents as the true colors of these seemingly friendly rodents is caught on camera. And what is the $1million prize after the voyage? The lucky winners get to lie on the dissection table and lend their bodies as a sacrifice to science!
http://www.marsdaily.com/reports/Mice_and_men_space_gerbils_blaze_trail_for_humans_to_Mars_999.html