Difficulty: Intermediate
USA
Judging by the 26 billion views on over 2 million YouTube videos of them, one thing is certain: cats are very entertaining. But their strange feline behaviors, both amusing and baffling, leave many of us asking: Why do cats do that? Tony Buffington explains the evolutionary history behind some of your cat’s strangest behaviors.
Difficulty: Intermediate
USA South
Destin Sandlin, an Alabama engineer and YouTube star, shows us how very difficult it is to learn to ride a backwards bike. You think it's going to be a piece of cake, but it's not!
Difficulty: Intermediate
India, Pakistan, United Kingdom
Who knows when we'll discover whether we are alone in the universe or not? Whatever the answer, the quest for more knowledge will never cease, nor grow dull.
Difficulty: Intermediate
Australia, Canada, USA
While it took Destin eight months to learn how to ride a backwards bike, his young son learned how in two weeks. The son's reward was a trip to Australia, where he got to meet Canadian astronaut Chris Hadfield.
Difficulty: Beginner
USA
Why do some of the national parks in the United States resemble the European Alps? Geologist Dr. Robert Darga answers this question.
Difficulty: Beginner
Germany, USA
Why are some rock formations and animals found on more than one continent? The explanation dates back to the Ice Age.
Difficulty: Intermediate
USA
In Yellowstone Park, visitors can see many indigenous animals in their natural habitat and wonder at the park's natural hot springs.
Difficulty: Intermediate
USA
Geysers represent a very popular tourist attraction in Yellowstone Park. How do they work and where do they come from? And what is sandstone? The video answers these questions.
Difficulty: Adv-Intermediate
USA
In this segment, we learn about the role weather plays in the creation of rock formations in the national parks of the United States.
Difficulty: Intermediate
USA
We learn more about how water interacts with the minerals in the rocks, and visit Monument Valley, a popular spot for filming westerns and commercials.
Difficulty: Intermediate
USA
The Colorado Plateau and the Grand Canyon are just a few of the amazing geographical features of the Southwestern United States.
Difficulty: Intermediate
USA
We visit Bryce Canyon, where valuable fossils have helped understand the geological history of the planet. The sandstone spires of the canyon are breathtaking.
Difficulty: Beginner
USA
In this segment, the narrator explains where the name Bryce Canyon came from, and why the sand dunes in the US and the large deserts of the world might be related.
Difficulty: Intermediate
United Kingdom
The BBC looks at a new and innovative renewable energy invention, Kite Power Solutions. It is estimated that 30 kites could provide electricity for 75,000 homes.
Difficulty: Beginner
USA
The narrator explains how the breathtaking rock formations of Antelope Canyon came to be, and why mountains around the world can provide a metaphor for human existence.
Are you sure you want to delete this comment? You will not be able to recover it.