How to Make a Tactile Feedback Compass Belt

Have you ever wondered how migratory birds manage to have such an amazing sense of direction despite being so generally clueless? They can sense the Earth's magnetic field with what is basically a compass built into their body. Wouldn't it be cool to feel what that's like? The following instructions are loosely based off of a research paper by the (German) OFFIS Institute of Technology, or Oldenburger Forsc ...

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