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Wood mouse, Apodemus sylvaticus) The front incisors of mice never stop growing, a trait shared by all rodents from the tiniest mouse to the largest capybara.

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Link to What Dinosaur Are You?
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Cartoon image of lab coats with T.rex name label

Our fossil insect collection includes Rhyniognatha hirsti, the world's oldest fossil insect, dating back some 400 million years.