The Galapagos giant tortoise, the largest living species of tortoise (and in the top 10 reptiles), likes to move around. 

We know this because scientists with the Max Planck Institute for Ornithology and the Charles Darwin Foundation have used GPS technology and 3-D acceleration measurements to find out that the dominant male tortoise will wander up to 10 kilometers into the highlands of the island – but only the fully grown animals migrate, the young tortoises stay in the lowlands.

Why?  And why don’t they rest during the dry season?  It’s a Chelonoidis nigra mystery of science.

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