Former Arkansas Gov. Mike Huckabee was a Republican presidential hopeful in the 2008 election. He writes that he wants his book God, Guns, Grits, and Gravy to introduce Americans to life in "flyover country." Justin Sullivan/AFP/Getty Images hide caption

When he was 59 years old, Greg O'Brien was diagnosed with early-onset Alzheimer's disease. Five years later, he is speaking publicly about his experience, even as his symptoms worsen. Courtesy of Greg O'Brien hide caption

One Saturday each month, the Pacific Science Center of Seattle opens early for people with autism spectrum disorders. John Keatley/Pacific Science Center hide caption

As the U.S. workforce continues to become more diverse, researchers are now more than ever examining diversity and bias in the work place. iStockphoto hide caption

Comedian Trevor Noah was born in South Africa during apartheid — "born a crime," as he says. Byron Keulemans hide caption