Geophysics

Geophysics is the study of the forces that shape the Earth from a global perspective. Learn about gravity, plate tectonics and other topics.

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What if we could just add water to something and solve the planet's energy crisis? That's essentially the idea behind artificial geothermal energy. But there's one possible catch: catastrophic earthquakes.

By Robert Lamb

Geysers are beautiful and their eruptions are exciting, but these fragile natural wonders are not to be trifled with. The water shooting from the geyser -- and the eruptions themselves -- can cause serious damage.

By Jonathan Atteberry

The Earth is incredibly heavy. How do scientists determine the weight of the Earth?

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Huge walls of cascading water never cease to capture our attention with their majesty. Ready to marvel at nature? Check out some of the most beautiful waterfalls in the world.

By Rick Mayda

One evening, people heard their local lake rumbling. A day and a half later, 1,700 people were dead. What happened on that fateful night?

By Susan L. Nasr

What are they? We'll give you a hint -- or four. Earth, wind, water and fire aren't among them, but our old friend and force gravity is.

By Craig Freudenrich, Ph.D.

Though it may seem disgusting to some, people all over the world must use waste water to irrigate their crops. Can you get sick from wastewater irrigation?

By Julia Layton

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Waterfall, or Cataract, a stream of water that falls in one or more steep descents.

The United States has an abundant supply to clean drinking water available in homes and businesses. But what if that water turned out not to be so clean? And what about the water supply around the world?

By Marshall Brain

Glaciers carve out lakes, grind down mountains and pulverize rocks to dust. These massive ice slabs shape our Earth, but they may be disappearing.

By Ed Grabianowski

One iceberg sank the unsinkable Titanic, and another exploded in front of an expedition. These floating chunks of ice carry their bulk deceptively below the surface of the water. What else are they hiding?

By Ed Grabianowski

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On a planet that is 70 percent water, people don't have enough clean, safe water to drink. We're in a water crisis, and water rights are becoming a big issue. What happens if we just plain run out?

By Josh Clark

Water is just hydrogen and oxygen, so why can't we do what nature does and combine the two? Unfortunately, it's not that simple, and the results can be rather ... explosive.

By Josh Clark & Jennifer Walker-Journey

In its purest form, it's odorless, nearly colorless and tasteless. It's in your body, the food you eat and the beverages you drink. All forms of life need it. What substance is more necessary to our existence than any other? Water.

By Shanna Freeman

The 7 wonders of the natural world capture the imagination with their natural power and beauty. There is nothing that man can create that can match the beauty nature can create. Learn about all 7, including the great barrier reef.

By the Editors of Publications International, Ltd.

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It used to take three years to get through the thick ice of the Northwest Passage. Now, you can sail from New York to Korea without hitting any ice at all. Where is all the ice going, and what are the ramifications of it melting 50 years too fast?

By Jacob Silverman

A lake in South America has disappeared and has left scientists wondering where all the water went to. Is it possible that a lake can abruptly vanish?

By Jacob Silverman

For more than 40 years, scientists have tried to figure out what's causing large parts of Canada to be "missing" gravity. The force of gravity around Hudson Bay is lower than surrounding areas. Learn about two theories that may explain the phenomenon.

By Jacob Silverman

A map is a type of language, a graphic way of representing information, whether it's to show population density or tell you how to get from Point A to Point B. Here's how they're made.

By Tracy V. Wilson & Alia Hoyt

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On February 17, NASA launched a rocket with a record-setting five satellites onboard. The $200 million mission is to discover the source of an atmospheric phenomenon known as the geomagnetic substorm.

By Julia Layton

Have you ever wondered what would happen if we were able to flip a switch and turn the Earth's gravity off for a day? The end result may surprise you.

By Marshall Brain

Even though it's tiny compared to the rest of the universe, the Earth is enormous, and it's extremely complex. Systems powered by the sun are able to sustain the various life forms living on Earth. Learn what ties all the parts of the Earth together.

By Tracy V. Wilson

You probably know that the North Pole does not stay in the same spot. The North and South Poles can actually change positions. What causes this? Find out in this article.

By Tracy V. Wilson

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Few things have done as much harm to humanity as fire, and few things have done as much good. Find out where fire comes from and see why it behaves the way it does. The answers might surprise you!

By Tom Harris

The polar ice caps have been in the news recently because of their alleged shrinking due to global warming. If this is true, how much would the oceans rise if the ice caps melted completely? Learn the answer to this question in this article.

By Marshall Brain