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Participants in the challenge must first set a compass bearing in the direction they are headed to properly navigate underwater.
Article

SCUBAnauts Splitting The Sign

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a spear fisher with a speared tropical fish
Overview

Sustainable Fishing

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On average, Arctic sea ice has decreased by four percent per decade since the late 1970s.
Overview

Sea Level Rise

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a frond of kelp underwater
Overview

Kelp and Kelp Forests

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a beaked whale surfaces
Article

The Evolution of Echolocation

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Two killer whales.
Article

How Drones in the Sky Unlock Secrets of the Sea

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The fluorescent shortnose greeneye fish.
Photo

A Shortnose Greeneye Fish Aglow

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Caribbean reef sharks swim over a coral reef in the Bahamas.
Photo

Caribbean Reef Shark

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Hedbergella sliteri - this specific specimen is the "holotype" for this species. That means it is the reference point for what all members of the species should look like.
Photo

Hedbergella sliteri

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Illustration of a four-legged proto-whale with webbed feet.
Photo

Early Whale with Webbed Feet

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Dolphins swimming among oily patches in the Gulf of Mexico
Photo

Dolphins Swim in Oily Waters

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A photo of zebra mussels clinging together, the mollusks have successfully invaded brackish and freshwater areas across North America.
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Zebra Mussels (Dreissena polymorpha)

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