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Geography Basics: Land Mass Motion

Related Article: Learn more about landslides.

Land mass movements usually take place on steep slopes during heavy rainfalls.

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Why? Tell Me Why! Alaska Oil (1:30)

After spending a week in Alaska, Discovery News' Kasey-Dee Gardner wanted to find out why the state is so abundant in that resource.

Sea Cliffs (0:41)

From the Archives of Discovery: Over time, the ocean erodes rock into dramatic and strange formations. Learn more about sea cliffs here.

Glitzy Gifts That Give Back (5:09)

The Diamond Information Center has spearheaded a project with four well-known charities in an effort to give back to those afflicted or affected by AIDS and Cancer. Shoppers will have the opportunity to purchase jewelry pieces with a portion of... More »

Prairies Explained (3:35)

Watch this episode of Eco Geeks about prairies on HowStuffWorks. Why do grasses dominate certain ecosystems while trees do not? Learn the answer and more about prairies in this episode of Eco Geeks.

Outdoors on the Alpine Tundra (5:38)

Watch this episode of Eco Geeks about the alpine tundra on HowStuffWorks. Different tree and plant life grow according to the environment at that elevation. Learn what grows at what elevations and what animals live in the alpine tundra in this... More »

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Exploring Time: Deep Ocean Drilling Ship (1:46)

On The Science Channel's "Exploring Time," go on board a specially made ship designed to drill to the Earth's crust in the ocean.

100 Greatest Discoveries: Burgess Shale Discovery (2:58)

Researcher Charles Walcott accidentally stumbled across this historical find that, once fully executed, contained over 65,000 specimens. Learn about the unprecedented discovery of the Burgess Shale on the Science Channel's "100 Greatest... More »

100 Greatest Discoveries: Radiometric Dating (2:54)

Bertram Boltwood's study of decaying radioactive uranium in rock formations provided insight into calculating the age of the Earth. Learn more about radiometric dating on the Science Channel's "100 Greatest Discoveries."

100 Greatest Discoveries: Geological Change (2:51)

On the Science Channel's "100 Greatest Discoveries," watch as Bill Nye examines Charles Lyell's study of rock formations and how they revealed that the process of geological change was slowly developed over time.

Natural Phenomena: Erosion and Uplift Work Together (1:18)

Uplift causes the land to rise, and erosion causes it to wear down. Together, uplift and erosion produce canyons and other landforms.

Earth Science: Radiometric Dating (5:31)

Radiometric dating is the process by which the age of a rock or fossil is determined through an examination of the decay of its radioactive elements. Learn more about radiometric dating in this video.

Earth Science: Geological Changes (3:25)

Geological changes are normal, expected developments that have occurred throughout Earth's history. However, abrupt geographical shifts may indicate serious, human-related problems. Learn more about geological changes in this video.

Greatest Discoveries with Bill Nye: Rocks of Ages (8:56)

Check out this clip to learn more about the Earth's atmosphere and climate.

Learning Geographical Terms: High Landforms (4:43)

The geographical terms "ford," "fault" and "volcano mountain" are explained and discussed in this video.

The Geology of Earth: Valley and Continental Glaciers (2:58)

Learn more about the nature of continental glaciers in this segment.