2016 Olympics

Norway isn't renowned for its prowess in summer sports. One exception: women's handball. The sport is huge in Norway, and the Norwegian women hope to snag their third consecutive gold medal.

With her goofy facial expressions, Fu Yuanhui has captured the world's attention — if not the gold — and is changing the way Chinese think about the Olympics and how athletes should speak and behave.

Cyclist Kristin Armstrong, who won Olympic gold at age 42, is one of many athletes saying that high-level sports aren't just for the young. And scientists say exercise reduces aging's toll for us all.