Earth Science

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

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Who owns the oceans?

Early explorers drove flags into the ground to claim territories. But no one bothered to float a flag in the oceans. For the most part, we peaceably shared the oceans until we realized what valuable goods could be found in their dark and murky depths.

How did scientists find soft tissue in dinosaur fossils?

Everyone knows that once a bone has fossilized, it's hard as a rock, right? So how did scientists find soft tissue inside a broken dinosaur bone?

How do scientists know what's inside dinosaur eggs?

Dinosaur eggs and the embryos inside can teach us a lot about dinosaur reproduction and behavior. But how do scientists get the rocky embryos out from the equally rocky shells?

How can you make water invisible?

It's colorless, odorless and definitely life-sustaining, but is it invisible to the naked eye? Not usually. So what's going on with everyone's favorite liquid?

Was Tyrannosaurus rex a predator or a scavenger?

Hollywood makes T. rex seem fast and agile, but some scientists think it was a scavenger, like a vulture. So which was it?

How Wave Energy Works

Rough times call for creative measures. The world is filled with oceans, and oceans are filled with wave energy that could potentially be transformed into power. Is wave energy a viable fossil fuel alternative?

How Hydrology Works

Without water, Earth would be a barren and lifeless planet. But did you know the Earth's water supply has not increased or decreased for billions of years? No wonder hydrologists are so fascinated by water.

Ocean Conservation Pictures

Ocean conservation has been a popular topic in many environmental debates recently. This collection of pictures show just why ocean conservation is so important.

Which of today's animals lived alongside dinosaurs?

We all know the cartoons of prehistoric people running from dinosaurs aren't realistic. But many animals living today have ancestors from that time.

How do scientists know if dinosaur fossils are male or female?

When they discover dinosaur remains, how do scientists know whether they found a male or a female? Would you believe it all comes down to one bone?

Glacier Pictures

One of the most impressive features of the natural world are glaciers. These massive sheets of ice can travel hundreds of miles. This gallery shows some of the main features of glaciers.

Ocean Current Pictures

Ocean currents can have an incredible impact on Earth's weather. This gallery of images shows how powerful ocean currents can be in the environment.

Waterfall

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

What are tide tables?

Whether you sail, surf, fish or collect shells, having one of these could help you out before you hit the water.

Diamond Pictures

Diamonds are some of the most brilliant and expensive natural features Earth has to offer. This collection of images displays diamonds in all their uncut and polished shapes and sizes. Obligatory pictures of very large diamonds are included of course.

How Ocean Currents Work

You might never notice the relentless movement of the oceans unless their waters went eerily still. What forces drive the oceans every second of the day?

What's the difference between stalactites and stalagmites?

One grows from the ground and one from the ceiling, but sometime's it's hard to remember which is the stalactite and which is the stalagmite. How do they get there, anyway?

How Landslides Work

Earthquakes and volcanoes get all the press. But the landslides they trigger are often more devastating. What makes the ground suddenly rip downhill, taking trees and homes with it?

What if a main water supply were infected with some form of bacteria?

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?

What if people wanted to use icebergs as a source of fresh water?

Seventy percent of the Earth's fresh water is in polar ice caps, the those caps calve icebergs all the time. So why can't we use those icebergs to provide fresh water that so many countries are in desperate need of?

How Glaciers Work

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

How Archaeology Works

Archaeology is the study of humanity's material remains -- even a piece of an ancient pot can tell us a lot about the past. But how do archaeologists make sense of these relics?

How Icebergs Work

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?

How Saber-tooth Cats Worked

Saber-tooth cats have long been likened to tigers, but they aren't tigers at all. While they share some physical traits and hunting practices with tigers, saber-tooth cats are also quite different.

Can scientists clone dinosaurs?

The 1993 movie "Jurassic Park" did a good job of bringing the idea of cloning dinosaurs into popular culture. It portrayed dinosaur cloning in a way that made sense to a lot of people, but is it really possible?


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