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Find Your Way

Animals don't use satellites or compasses, yet many, like homing pigeons and lobsters, know exactly where they are and how to get to where they want to go. What do they know that we don't, and how can we use it to help us find our way when our GPSs can't use satellites? (story and video): http://news.cnet.com/8301-11386_3-57472649-76/tapping-earths-magnetic-field-for-indoor-navigation/?tag=cnetRiver

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