First known fossilized dinosaur brain unearthed, scientists claim

Fall into swamp probably helped preserve tissue

Fossil brain

DINO BRAINS  A fossilized chunk of bone and brain belonged to an herbivorous dinosaur that lived roughly 133-million-years ago. A British two-pence coin, about the size of a U.S. quarter, is shown for size.

Jamie Hiscocks

SALT LAKE CITY — Dinosaur smarts may be a mystery, but their brains, at least, are now more concrete.