Magneto-tactic bacteria align in the earth magnetic field. This allows them search for the bottom of ponds or marshes. In the lab, we can trick the bacteria with our own magnetic fields, and make them dance. Read more in this publication by Marc Pichel. This video won the 2014 MicroTAS video competition.
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"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too? -- Douglas Adams |