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Radiolab

CHAPTER

Foxes - What Are the Neurocrest Cells?

An early fox embryo needs neurocrest cells to grow strong teeth and fur. Neurocrest cells are like pioneers that move throughout the body, blazing trails all over the place. Foxes whose adrenal glands don't mature quickly might have the function of making the animal more tame. But what you're doing is a byproduct of that Is selecting for guys who don't get as many of those cells into their ears.

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