Some things attract attention despite looking very ordinary. This is true for ammonites. This marine mollusc with a spiral shell has been studied in detail. Ammonites evolved very rapidly. Because we can date the different ammonite families in the Earth’s geological timeline, we can break down the history of our planet very precisely. Also, ammonites were swept by currents into all the oceans around the world, thereby linking very distant lands.

Ammonites no longer exist, but their cousin, the Nautilus, does. The Nautilus appeared 300 million years ago. It doesn’t seem any better adapted than ammonites were, just luckier!
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