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Thorny problem

I am puzzled by brambles, raspberries and blackberries. They have sweet, juicy fruit, presumably so they will be eaten by animals who will spread their seeds. But they also have prickles. What's the good of that?

8 November 2017

I am puzzled by brambles, raspberries and blackberries. They have sweet, juicy fruit, presumably so they will be eaten by animals who will spread their seeds. But they also have prickles. What’s the good of that?

Eric Kvaalen, Les Essarts-le-Roi, France

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