Thorny problem

Publication date: 7 July 2018Source: New Scientist, Volume 239, Issue 3185Author(s): 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?
Source: New Scientist - Category: Science Source Type: research