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http://thisisaway.org/get-involved/ ">loans with long term payments One specific example has already been developed by SINTEF. Called Wheeko, this robot was created to study snake robot locomotion on flat surfaces. It has 10 identical joint modules with two degrees of motion each, and passive wheels to allow it to slither forward over flat surfaces, roll sideways, sidewind, and even rear up in a surprisingly lifelike fashion. It may be a very long way from what a practical Mars snake would be like, but it shows what the possibilities are.