Meet two animals. Both are teeny. Both live in water. Both mature extra fast. But while one dies in about a week, the other — well, prepare to... A puzzlement. Why, I wonder, are both these things ...
Why, I wonder, are both these things true? There is an animal, a wee little thing, the size of a poppy seed, that lives in lakes and rivers and eats whatever flows through it; it’s called a ...
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