Description
Sharks are some of the oldest creatures on the earth (or, rather, in its waters). This epic survey follows sharks from their earliest appearance in the Paleozoic era up through the challenges they face today.
Along the way, readers will meet many different sharks from different points in history. They will get an up-close evolutionary look at what makes a shark a shark—like their skin, their teeth, their fins, and more. And they will get a crash course in archeological time, as the book mostly covers prehistoric sharks or modern-day sharks who have been around much longer than humans. Like the hammerhead, who has been patrolling tropical coastlines for more than 20 million years!
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