1. Courtesy of http://www.theoi.com/Olympios/Ares.html
2. Courtesy of http://www.flickr.com/photos/chrisbaugh/270387000
3. Courtesy of http://www.wfu.edu/~moran/z_GIF_images/5_xing_citation_order.gif
4. Courtesy of Jet Propulsion Laboratory (JPL) and National Aeronautics and Space Administration (NASA). See http://mars.jpl.nasa.gov/mystique/
5. Courtesy of http://en.wikipedia.org/wiki/Mars
6. Courtesy NASA and JPL. See http://mars.jpl.nasa.gov/science/
7. JPL and NASA. See http://mars.jpl.nasa.gov/facts/
8. For 1960-2005, JPL and NASA. See http://mars.jpl.nasa.gov/missions/log/
9. Courtesy of NASA and JPL. See http://mars.jpl.nasa.gov/missions/present/odyssey.html
10. Courtesy of NASA and JPL. See http://mars.jpl.nasa.gov/missions/present/2003.html
11. Courtesy of NASA, JPL and ESA. See http://mars.jpl.nasa.gov/missions/present/express.html
12. Courtesy of NASA and JPL. See http://mars.jpl.nasa.gov/missions/present/2005.html
13. Courtesy of NASA and JPL. See http://mars.jpl.nasa.gov/missions/present/msl.html
14. Courtesy of NASA and JPL - Caltech/University of Arizona. See http://www.nasa.gov/mission_pages/phoenix/images/press/Solar_Array_and_Instrument_Deployment.html
15. Courtesy of JPL and NASA. See http://www.jpl.nasa.gov/news/news.cfm?release=2008-154
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