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Fwd: Hadrosaur tooth grinding

Rescued from truncation:

 Good morning list, I recently read the new Phil Currie Dinosaur Gangs
 book, which mentioned something in passing that I'd not heard of
 elsewhere: it mentions a scan done on Hadrosaur eggs which showed
 that the embryos already had their little batteries of teeth and were
 already grinding them down prior to hatching. Does anyone have a
 paper citation or some photographs of this? Would be much