Coevolution often involves an arms race. You have a predator and prey both upping the game. Like a bat and a moth. Each one trying to outdo the other. If the change in one organism is linked to a change in another organism, genetically speaking, then coevolution is said to have occurred.

Evolution Talk is also a book! You can find links to Amazon, Barnes & Noble and others on the front page of EvolutionTalk.com, or call your local bookstore and ask them to order a copy.

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