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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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a diagram of a killer whale using echolocation
Photo

Echolocation

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Two killer whales.
Photo

Killer Whales from Above

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A black and white illustration of a Cuvier's beaked whale.
Audio

Cuvier's Beaked Whale

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In this painting, a giant squid engages in a struggle for survival with a sperm whale.
Article

The Mystery of Ambergris

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a worker sits inside the cast of a whale
Photo

The Cast of a Whale

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A white crabeater seal resting on an iceberg.
Photo

Crabeater Seal

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an elephant seal with a tracker
Article

Citizens of the High Seas

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A mother and calf humpback whale swim side-by-side.
Photo

Mother and Calf

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Sea lions generate thrust, or forward propulsion, by bringing their fore-flippers together in big sweeping motions called “claps.”  When a sea lion “claps,” it stretches its flippers out to the sides and sweeps them down. Then it tucks its flippe
Photo

Aquatic Locomotion of a Sea Lion

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A manatee swims in Crystal River, Florida.
Photo

Florida Manatee in a Fresh Water Spring

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A right whale breaches, lifting its huge body out of the water.
Overview

North Atlantic Right Whale

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