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Offshore Peru, during the Eocene (~56-34 million years ago), showing two archaeocetes (ancient whales): Ocucajea picklingi and Supayacetus muizon.
Article

New Archaeocetes from Peru Are the Oldest Fossil Whales from South America

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an elephant seal with a tracker
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Elephant Seal with Tracker

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veterinarians hold a dolphin
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Bay Dolphin

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A North Pacific right whale swims in the Bering Sea.
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North Pacific Right Whale

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A half-cast and skeleton of a humpback whale in the National Museum
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A Half-Cast of a Whale

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The bowhead whale has a massive, bow-shaped skull.
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Bowhead Whales

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A white crabeater seal resting on an iceberg.
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Crabeater Seal

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A common bottlenose dolphin swimming.
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Common Bottlenose Dolphin

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A mother and calf humpback whale swim side-by-side.
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Mother and Calf

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a veterinarian listens to a dolphin's heartbeat
Article

The Musical Hearts of Dolphins

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A vaquita swims at the water's surface.
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Mysterious Vaquitas

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Two sea lions interact amongst schools of small fish.
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Seal or Sea Lion?

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