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Dinosaur fossils and continental driftDinosaurs are found in sedimentary layers on every continent, supporting the theory that the current continents drifted from one giant landmass. - No fossils are found after a layer of iridium-encrusted clay, which was laid down about 65 million years ago. Because iridium is more commonly found in meteorites, this layer links the mass extinction of the dinosaurs to an impact event.
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Dinosaur eggs from ChinaThe largest fossilized dinosaur eggs ever found belong to Hypelosaurus and are about a foot long. -
Fossilized dinosaur dungBecause fossilized dinosaur dung, known as coprolites, can contain plant and animal matter, they reveal whether the dinosaur that produced it was a plant or meat eater. -
Triceratops skullScars on some fossilized skulls, such as those of the Triceratops, show that they battled each other, most likely for dominance in the herd. - In 2007, 16-year-old Tyler Larson uncovered a partially intact Hadrosaur "mummy" that included skin and soft tissues, such as tendons and ligaments. This fossil revealed that the species was 25% larger than previously thought and could reach speeds of up to 28 mph.
