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Beskrivelse
Ancestors of horseshoe crabs date back over 450 million years. That's before dinosaurs walked Earth. Readers will find out more about these intriguing arthropods, which aren't even crabs! They will explore theories about why they survived while dinosaurs became extinct. They'll learn about horseshoe crabs' unique behaviors, how they've adapted over the years, and gain an overall appreciation for these magnificent marine creatures.