BECAUSE YOU TOUCH YOURSELF AT NIGHT! Dinosaurs roamed the Earth for about 160 million years.
Then about 65 million years ago they vanished. No-one really knows why.
Some scientist think that a huge meteor hit the Earth and started volcanic
eruptions - the dust and ash would have blotted out the Sun for years.
Or perhaps the Earth's climate grew much colder and the cold-blooded dinosaurs
could not stand the cold as well as the warmblooded mammals that had begun
to live on Earth.
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