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Photograph of the model of a Giant Megatooth Shark, taken from the front..
Slideshow

Shark Ancestors

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serrations from sharks on a fossilized whalebone
Photo

Bite Marks From the Past

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A close-up image of a fossil shark jaw with teeth.
Article

Shark Teeth Tell Great White Shark Evolution Story

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An Illustration of small tentacled fossils.
Photo

Ancient Entoproct Community

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ichthyosaurs frolic in the waves
Article

Form Equals Function for Ancient Sea Lizards and Modern Whales

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Two nurse sharks hover over a baited cage
Lesson Plan

The Puzzle of Ice Age Americans

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Two nurse sharks hover over a baited cage
Lesson Plan

The Methane Circus

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A skeleton of an ichthyosaur
Photo

An Ichthyosaur's Bones

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A shark tooth embedded in a bone
Photo

A Tooth Left Behind

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A fossil imprint of Haplophrentis carinatus with two oar-like appendages.
Photo

Haplophrentis carinatus

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Illustration of Opabinia with five eyes and what look like scales.
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Opabinia

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A fossil imprint of Ottoia prolifica.
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Ottoia prolifica

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