Why do some of the national parks in the United States resemble the European Alps? Geologist Dr. Robert Darga answers this question.

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.

How football arrived in Australia and the state of the game heading into the 2014 FIFA World Cup Brazil™.

Happy New Year to everybody on our beautiful planet Earth from the International Space Station!