Mixodectes pungens, a species of small mammal that inhabited western North America in the early Paleocene, was a mystery.

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It includes a partial skull with teeth, spinal column, rib cage, forelimbs, and hind limbs. The researchers determined that the skeleton belonged to a mature ... Mixodectes was quite large for a ...

We spoke to experts to find out — but first, a quick anatomy refresher on ... can be surprisingly painful. The large ...