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A rendering of an ocean scene as it may have looked 65 million years ago, when an astroid fell to Earth and triggered a mass extinction event.
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Cretaceous-Paleogene Boundary (65 Million Years Ago)

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Paleobiologist Mark D. Uhen drills away rock to reveal the fossilized bones of Peruvian archaeocetes (ancient whales), in the Vertebrate Paleontology Department at the Museo de Historia Natural de San Marcos. Uhen is a professor at George Mason Univer
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Preparing a Fossil Whale Specimen

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“I took this photograph of spinner dolphins in calm waters off the Ogasawara Islands, an archipelago in the Pacific Ocean about 600 miles south of Tokyo. When the sun briefly broke through the clouds, our shadow was mirrored in the water’s surface—an
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Spinner Dolphins Ogasawara Island, Tokyo, Japan

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Dr. Clyde Roper (rear) and museum specialist Mike Sweeny examine a giant squid specimen.
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Studying Giant Squid

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This bait ball shows how small fish can react when larger predators are near, gathering tightly together in a ball-like formation that exposes the least number of fish.
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Bait Ball

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A Pontoh pygmy seahorse
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How Many Seahorse Species?

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This purple urchin Paleopneustes cristatus is seldom seen by itself, and can be found in groups of hundreds.
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Purple Sea Urchin

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The Sargassum frogfish is a small but voracious predator - it can ingest animals up to it’s own size!
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Sargassum Frogfish

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This painting of swarthy buccaneers in the midst of a fierce battle was painted by the prolific American marine painter Frederick J. Waugh, and won the Thomas B. Clarke award in 1910 for the best American figure composition.
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The Buccaneers painting

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ichthyosaurs frolic in the waves
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Form Equals Function for Ancient Sea Lizards and Modern Whales

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two brittle stars in a tank
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Brittle Star Splits

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These zooplankton collected on a research cruise include a jellyfish, a lanternfish, a snipe eel, two large orange shrimp, a fuzzy pyrosome (which is bioluminescent), and several smaller animals.
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One Fish, Two Fish: Estimating Undiscovered Species

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