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Two sea lions interact amongst schools of small fish.
Slideshow

Seal and Sea Lion Pictures

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Two nurse sharks hover over a baited cage
Lesson Plan

WebQuest: Sensory Biology and the Plight of the Right Whales

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The head of one bottlenose dolphin and the fin of another are visible above turquoise water in the Potomac River
Article

A Dive into Dolphin Data: The History of Bottlenose Dolphins in the Potomac River

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Smithsonian researchers eat a meal in preparation for a fossil excavation
Slideshow

A Squalodontid Success

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A polar bear and its cub in Arctic National Wildlife Refuge, Alaska.
Slideshow

Celebrating Marine Moms

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A hippopotamus-like creature swims underwater
Article

Flippers or Feet? An Extinct Mammal May Have Been Replaced By Today's Sea Cows

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Walruses use sea ice as platforms on which to nurse their young and launch their dives.
Article

Walrus: An Arctic Mammal in Peril?

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Smithsonian scientists race the tide the excavate an ancient whale fossil entombed in rock
Article

Fossil Whale Found, Excavated, Jacketed, and Returned to STRI!

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Polar bears are threatened by a lack of sea ice.
Article

Climate Change at the Poles

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a painting of a ship on a plate of baleen
Article

The Story of Stashed Whale Baleen

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The Ross Sea is a 1.9 million square mile (3.6 million square km) stretch of ocean off the coast of Antarctica.
Slideshow

A Trip South to Antarctica’s Ross Sea

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A harp seal in icy water
Overview

Seals, Sea Lions, and Walruses

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