Geophysics is the study of the forces that shape the Earth from a global perspective. Learn about gravity, plate tectonics and other topics.
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? See more »
A lake in South America suddenly disappeared and left scientists wondering where all the water went. Is it possible that a lake can abruptly vanish? And if so, what are the causes behind this watery mystery?
See more »
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?
See more »
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?
See more »
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.
See more »
One evening, people heard their local lake rumbling. A day and a half later, 1,700 people were dead. What happened on that fateful evening?
See more »
Glaciers carve out lakes, grind down mountains and pulverize rocks to dust. These massive ice slabs shape our Earth, but they may be disappearing.
See more »
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?
See more »
It's no secret that maps are handy. If you get lost, a map can help you find your way. Maps are representations of data that can describe nearly anything about the world. Find out how map data is gathered and how maps are made.
See more »
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.
See more »
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.
See more »
Water is quite arguably the most important substance on Earth. Its unique properties make it an incredibly versitile tool. Aside from fueling life, it's useful in cleaning, cooking and transportation, just to name a few things.
See more »
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.
See more »
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?
See more »
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.
See more »
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.
See more »
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?
See more »
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.
See more »
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?
See more »
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.
See more »
The Earth is incredibly heavy. How do scientists determine the weight of the Earth?
See more »
