Turtles, birds, and butterflies can migrate thousands of kilometers--even over vast oceans largely free of landmarks. Scientists suspect that these animals find their way by sensing Earth's magnetic field, yet the exact nature of this internal compass has remained a mystery. Now, researchers believe they have come closer to solving the puzzle: a magnetic-sensing chemical reaction within the eye.
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TU Müenchen develops steel 'Velcro' - News - The Engineer - 1 views
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