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Biology

Why do sharks sleep?

+ Available in upper and lower reading levels
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Biology

Why do some clownfish not breed?

Scientists investigate an evolutionary puzzle: why some clownfish choose to remain peacefully in their social groups, even though this means they may not breed.

Biodiversity and Conservation

Where did flying reptiles come from?

Researchers found out that the first flying vertebrates were very closely related to a small dinosaur-like group of animals.

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