National

(Revised and updated @ 5:55 pm ET)

Will the London 2012 Games be remembered as the last Olympics of the pre-clone era? The answer is maybe — because the group that oversees equestrian events has given its OK to allowing cloned horses to compete in the Summer Olympics.

The paleolithic diet has sparked plenty of discussion in the nutrition world (and on this web site) in the last few months. Lots of people are looking for advice on how to get in on this meat and vegetable-centric way of eating that claims inspiration from the simple wild foods a hunter-gatherer might have been lucky to find.

After the July 20 mass shooting at a movie theater in Aurora, Colo., there were calls to focus as much or more on the victims and their stories as on the gunman.

U.S. gymnast Aly Raisman has won the gold medal in the women's floor exercise at the London 2012 Games. Her powerful routine garnered a score of 15.600 — enough to beat the 15.200 of Romania's Catalina Ponor, who turned in a technically strong performance.

Russia's Aliya Mustafina took bronze, with 14.900. American Jordyn Wieber finished seventh, with a 14.500 score.

Scientific evidence is mounting on the links between sports and concussions. Host Michel Martin explores what some are calling the "concussion crisis" for athletes. She speaks with Chris Nowinski, author and co-founder of the Sports Legacy Institute, a group focused on researching concussions in sports.

Mounting scientific evidence is linking football to brain trauma. While calls to increase safety measures in football are getting louder, players themselves often resist efforts to change the game. Host Michel Martin speaks with former Pro Bowl NFL player LaVar Arrington, who argues that the risks of the sport are worth it.

Concussions make up about 15 percent of all high school sports injuries, according to Children's Hospital Boston. But how can parents decide whether children should play sports, and how to keep them safe? Host Michel Martin talks with three "sports" moms, including a pediatrician who studies concussions in children.

Thousands of former players or their families are filing lawsuits, alleging that the league downplayed the risks for concussions. But the NFL denies wrongdoing. Host Michel Martin speaks with two sports reporters about the NFL's current approach to reducing concussions.

Two cheetah cubs whose cuteness recently landed them on Facebook and Tumblr pages around the Internet have been named after U.S. Olympians competing in London.

Presumably, it was the cheetahs' fabled speed, not cuteness, that inspired officials at the National Zoo in Washington, D.C., to name them Carmelita and Justin, after sprinters Carmelita Jeter and Justin Gatlin.

The three-month-old felines' namesakes won silver (Jeter) and bronze (Gatlin) medals in the 100-meter sprint at the Summer Games.