Earth Science

Earth Science covers all facets of how the earth works, from from volcanoes to the world's oceans.

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How can a lake simply disappear?

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?

How can parts of Canada be 'missing' gravity?

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.

How Maps Work

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.

How DEPTHX Works

What would you need to explore an ocean on Europa, one of Jupiter's moons? Among other things, you'd need a submersible vehicle to explore the ocean and relate findings back to Earth. Stone Aerospace is developing just such a vehicle: the DEPTHX.

What is a geomagnetic substorm?

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.

What if there were no gravity on Earth?

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.

How the Earth Works

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.

Why does the North Pole move?

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.

How Fire Works

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!

How Quicksand Works

Countless movies and television shows depict quicksand as some kind of living creature that sucks its victims down into a bottomless pit, never to be heard from again. Well, you can't believe everything Hollywood tells you.

How Rip Currents Work

Rip currents are the number-one concern for beach lifeguards: About 80 percent of all beach rescues are related to rip currents. Learn what they are and what you should do if you get caught in one.

What Are the 'Four Cs' That People Talk About When Buying a Diamond?

Whenever people talk about buying diamonds, they keep mentioning the four Cs. What do they have to do with diamonds?

How Diamonds Work

Diamond engagement rings. Diamond anniversary bands. Diamond earrings and necklaces. And now, the right-hand diamond ring! The four Cs -- cut, clarity, carat and color. Find out what the fuss is all about.

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.?

How Carbon-14 Dating Works

Carbon-14 dating is something that you hear about in the news all the time. Everything from mastodons to the Shroud of Turin has been dated using this technique! Learn about how carbon-14 dating works and why it is so accurate!

If the polar ice caps melted, how much would the oceans rise?

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.

What would happen if I drilled a tunnel through the center of the Earth and jumped into it?

Let's say you have a lunch date to make – and it's on the other side of the planet. Wouldn't it be way more convenient to pop down a hole and take a 42-minute journey through Earth's innards?

How does a seismograph work? What is the Richter scale?

A seismograph can accurately measure the movement of the Earth during a quake. How does a seismograph work, though, and what is the Richter scale that is associated with earthquakes? Learn the answers to these questions in this article.

How much water is there on Earth?

Water is one of the most abundant substances on the planet. About 70 percent of our planet is covered by ocean. Just how much water is there on Earth? Find out the answer to this question in this article.

How does gravity work?

Gravity is a force that we experience every minute of our lives, but hardly notice or give a passing thought to in our daily routines. Have you ever wondered what gravity is and how it works? Learn about the force of gravity in this article.

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?

How Moissanite Jewels Work

Diamonds are beautiful and popular - but not everyone can afford these gems. While man-made versions are less expensive, most lack the luster and brilliance of the real thing, except moissanite. See how it compares!

Why is water vital to life?

Do you ever play that game in which you select the items you'd bring if you got stuck on a desert island? Along with that treasured bootleg recording of your favorite band, we think that an endless supply of water should be at the top of your list. Here's why.


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