OCEANOGRAPHY

Oceanography is the study of the oceans as ecological systems. In this section, learn about topics like currents, deep-sea research or how rogue waves work.
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Should we be worried about the dead zone in the Gulf of Mexico?

The dead zone, caused by massive amounts of algae growth, is a vast area off the Gulf of Mexico that is deadly to marine life. How is human activity making the dead zone worse?

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  • Why is seawater salty?

    Why is seawater salty?

    If you've ever been pulled underwater at the beach and came up sputtering with a mouthful of salt water, you might wonder where the ocean picked up that briny flavor. Read on to learn just where all that salt comes from. See more »

  • Why is the world's biggest landfill in the Pacific Ocean?

    Why is the world's biggest landfill in the Pacific Ocean?

    What's as big as a continent and sitting in the middle of the Pacific Ocean? A pile of garbage that extends 100 feet (30 meters) below the surface of the water. See more »

  • How do they measure sea level?

    How do they measure sea level?

    How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not? See more »

  • Why are the waves on the U.S. West Coast larger than the waves on the East Coast?

    Why are the waves on the U.S. West Coast larger than the waves on the East Coast?

    If you ask anyone interested in surfing, they'll probably tell you that you need to be on the West Coast in order to find the biggest waves. But why is that? Why are the waves bigger on the West Coast when compared to the East Coast of the U.S.? See more »

  • Keep Your Junk out of the Pacific Ocean Trash Vortex

    Keep Your Junk out of the Pacific Ocean Trash Vortex

    The Pacific Ocean trash vortex is explained in this article. Learn about the Pacific Ocean trash vortex. See more »

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