In a country shaped by warlords, Saturday's presidential election features two urbane men with doctorates vying to replace Hamid Karzai. Both want close U.S. relations, including a security deal.
The next time this phenomenon will happen is Aug. 13, 2049.
A new study of athletes suggests exercise may help support a rich, diverse mix of bacteria in the gut. But scientists say the athletes' high-protein diet may also be supporting the community.