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
USA
This video is a Webby Award winner. Amnesty International supporters have used the power of words to demand freedom and justice for countless human rights defenders around the world. Our words are proof that when you stand up for human rights, you never stand alone.
Difficulty: Beginner
Australia
How football arrived in Australia and the state of the game heading into the 2014 FIFA World Cup Brazil™.
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