Dinosaurs first appeared roughly 230 million years ago and eventually became the dominant land animals, holding that status until an asteroid struck Earth 66 million years ago, causing a mass extinction of species.
Dinosaurs first appeared roughly 230 million years ago and eventually became the dominant land animals, holding that status until an asteroid struck Earth 66 million years ago, causing a mass extinction of species.
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Dinosaurs first appeared roughly 230 million years ago and eventually became the dominant land animals, holding that status until an asteroid struck Earth 66 million years ago, causing a mass extinction of species.
