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How the Mars Rovers Work
science.howstuffworks.com/mars-rover.htm
Of course we want to go to Mars. Until we figure it out though, roving robots with names like Spirit, Opportunity, Sojourner and Curiosity are our best bet for digging up dirt on our nearest planetary neighbor. Want to go along for the ride?
How Sci-fi Doesn't Work
entertainment.howstuffworks.com/sci-fi.htm
Learn how sci-fi doesn't work in some popular movies and TV shows.