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How small does an animal have to be to have small fleas?

How small does an animal have to be to have small fleas?

29 April 2020

How small does an animal or insect have to be before it can't have fleas, mites or lice?
How the turtle got its shell: Amazing fossils are solving the mystery

How the turtle got its shell: Amazing fossils are solving the mystery

29 April 2020

For years, the oldest turtle fossils we could find had fully formed shells. Now, more primitive fossils are revealing the strange tale of how turtle shells evolved

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