Coprolites, or fossil droppings, of the dinosaur-like archosaur Smok wawelski contain lots of chewed-up bone fragments. This led researchers at Uppsala University to conclude that this top predator was exploiting bones for salt and marrow, a behavior often linked to mammals but seldom to archosaurs.

The researchers found several crushed teeth in the fossil droppings, probably belonging to Smok wawelski itself.
The teeth were crushed…

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Source: archeo