Modern Olympic history is full of heart-thumping victories and painful defeats. But a look back at the 28 Summer Games that have taken place since 1896 also offer a snapshot of geopolitics, a shift in women's rights and the state of...

This polar expedition took place in 2008, but you can still experience the thrill of following these scientists as they engage in research studying the changes in Greenland's ice sheet. Meet the research team and learn about the...