• "We think of dinosaurs as ancient creatures, but they evolved recently in terms of Earth's long history"

(Lessem 6).

• "The first dinosaurs evolved from other reptiles in the Late Triassic Period, nearly 230 million years ago" (Lessem 14).

• "The Middle Jurassic is the mysterious heart of dinosaur time. Around the world, only very few rocks from this time have been found, so dinosaurs and their environment are little known" (Lessem 70).

3 Important Facts