Two heads are better than one, but only up to a point. And more heads than two heads can be the head of a problem that two heads are needed to solve.

But we all know how to deal with hydras no matter where they are encountered and we all know what not to do when we encounter them. Don't go it alone, bring a friend. Fortunately for the hydra, it can make its own friends. Well, in biology class anyway.

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