Dams are great for humans, providing hydroelectricity and flood control. They're also horrible for the rivers they block. Here are three success stories of ecosystems that bounced back after a dam was removed.



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In the early 20th century, the US had expanded from coast to coast, but many cities in the southwest still lacked reliable water sources. The Colorado River's erratic flow and frequent floods made it unreliable for agriculture, and the...

Want a Pineapple? If you want a pineapple, it's possible you can just run down to the store and get one. But, if you wanted to grow one, that's a lot more difficult depending on where you live. In this episode of Crash Course Kids,...

If you compare precipitation around the world with population distribution we can understand a simple but powerful pattern of human geography: where there is water, there are people. But it gets a little more complicated because where...

How Mormons & Mobsters Made Las Vegas What It Is Today

Lake Mead falls to lowest level since Hoover Dam's construction as "apocalyptic" heatwave and drought hit parts of US.

Discover the incredible history and engineering behind the Hoover Dam in this short and informative video. Learn how this massive concrete structure was built during the Great Depression and why it remains one of the most famous dams in...

A video entitled “Hydroelectric Dams” which investigates how hydroelectric dams affect the environment.

The Hoover Dam is not only an impressive feat of engineering, but also a multi-purpose structure that controls water distribution generates power, and provides recreational opportunities. As the tallest dam in the world, it effectively...

Exploring Las Vegas, USA:Our adventure concludes in the vibrant city of Las Vegas, Nevada, surrounded by majestic mountains and the vast Mojave Desert. Beyond its reputation for luck and lights, Las Vegas offers a diverse array of...

Nevada is a truly unique state within the United States. Its geography is predominantly dry and arid and this has left it mostly unsettled throughout history. As such, the federal government of the United States has ended up owning the...

The construction of the then-largest dam in the world: how was the construction of the dam achieved and what is its legacy today? Earth Science - Earth's Resources - Learning Points. The Hoover Dam was built in the 1930s in Nevada, USA,...

Dr. Forrester discusses the importance of rivers on the development of cities, such as in Pittsburgh and Las Vegas.

Dr. Forrester describes the ways that severe environmental conditions, such as earthquakes, wildfires, mudslides, and droughts, challenged settlers in the United States. She talks about how the Hoover Dam was built for flood control. She...

Dr. Forrester shows the various landforms and bodies of water located in the different regions of the United States.

Dr. Forrester discusses interactions between people and their environment and how environmental processes and characteristics influence human settlement and activity.

Dr. Forrester defines electromagnetism and magnet by identifying the relationship between electricity and magnets and how they come from the same force.

Dr. Forrester talks about the many uses of water. She will talk about water treatment plants. Dr. Forrester will also brainstorm with your student how to conserve water.

The Hoover Dam discusses the history, construction, and physical features of the Hoover Dam.

We’re scaling incredible heights on this episode of Travel Thru History. We visit a civil engineering wonder on the border of Arizona and Nevada - the Hoover Dam. This massive structure not only attracts about a million tourists each...

We’re scaling incredible heights on this episode of Travel Thru History. We visit a civil engineering wonder on the border of Arizona and Nevada - the Hoover Dam. This massive structure not only attracts about a million tourists each...

We’re scaling incredible heights on this episode of Travel Thru History. We visit a civil engineering wonder on the border of Arizona and Nevada - the Hoover Dam. This massive structure not only attracts about a million tourists each...

This program explores the geography, history, and some important cultural features of the Southwestern Region of the United States. The individual states of Texas, New Mexico, Arizona and Nevada are presented in detail.

Journey around the globe with ten-year-old animated character Emily, as she presents iconic landmarks from A to Z!  Each upper-case letter of the alphabet gets presented several times then linked to a corresponding landmark, which makes...