Rover Factory Tour

http://cosmiclog.msnbc.msn.com/archive/2009/06/15/1963818.aspx

Make sure you watch the Mars Science Laboratory rover arm video:
http://mars.jpl.nasa.gov/msl/news/whatsnew/video/EM_RA_ROM_Test_320x240.mov

It has 75 lbs on the end, but luckily Mars gravity is 38% of Earth's.