A 75 million-year-old tyrannosaur's well-preserved stomach shows it feasted on baby dinosaurs for its last meal

A Gorgosaurus Skeleton on display.

Alexi Rosenfeld/Getty Images

• Tyrannosaurs were some of the most formidable predators of their time, known to eat large herbivores.
• Researchers discovered the well-preserved remains of baby bird-like dinosaurs inside a tyrannosaur's stomach.
• The discovery suggests that tyrannosaurs' diets changed as they grew. 

A fossilized dinosaur from about 75 million years ago had its final meal well-preserved in its stomach, revealing surprising details about its diet.