Most people who say they've had a concussion say they sought out medical care at the time. Science Photo Libra/Getty Images hide caption

A man performs yoga in the Babilonia favela overlooking Rio de Janeiro in 2014. The Brazilian government made a big push to impose order on the shantytowns in advance of the World Cup in 2014 and the Olympics this summer. Babilonia was once considered a model, but violence has been on the rise in the run-up to the games. Mario Tama/Getty Images hide caption

Scientists say bumblebees can sense flowers' electric fields through the bees' fuzzy hairs. Jens Meyer/AP hide caption

Furloughed Polar workers picket outside Polar's Caracas brewery, which shut down in April. They are protesting against the government, which has impeded Polar's ability to import barley. John Otis for NPR hide caption

The rock group Luna is reuniting, performing shows again and releasing a box set of its five albums. Stefano Giovannini hide caption

Students at Do Space learn to use a laser cutter during a crash course on how to design a key chain. Joy Carey/NET News hide caption

Majd kept a journal about a time in her life when she was torn between getting married or going to school. Courtesy of Madj hide caption