This composite image shows Republican vice presidential candidate Rep. Paul Ryan (left) and Vice President Biden. Both men are Catholic, but their worldviews are strikingly different. Jose Luis Magana/Thanassis Stavrakis/AP hide caption

David Oh, wife Bryn and his children Braden, 13, Ashlyn, 10, and Devyn, 8, picnic in Santa Monica beach at about 1 a.m. David Oh hide caption

China is planning to increase investments in Pakistan, and some Pakistanis feel China is trying to become a new colonial power. Amid these tensions, a bomb went off near the Chinese Consulate in Karachi, Pakistan, on July 23. The blast injured two people. Rizwan Tabassum/AFP/Getty Images hide caption

Some scientists predict that by 2050, climate change and an accompanying rise in sea level will lead to frequent flooding in Boston. jeffgun/Flickr hide caption

Adam Frank stands atop of the Wilder Building in Rochester, N.Y. Carlet Cleare /WXXI hide caption

Water gets churned up at the end of a dredging pipeline connected to a U.S. Army Corps of Engineers dredge on the Mississippi River near Memphis, Tenn., on Monday. The river has seen water levels from Illinois to Louisiana plummet because of drought conditions in the past three months. When there's less flow coming downstream, saltwater from the Gulf wedges its way in. Adrian Sainz/AP hide caption

Forced into exile from Sierra Leone, Janka Nabay (left of center) now makes his mysterious, mesmerizing music in Brooklyn. Courtesy of the artist hide caption

Kenyan cook Mwangi grills up nyama choma, which usually involves nearly all the parts of a goat, at the popular Sagret Hotel in Nairobi. John Burnett/NPR hide caption

Connected car technology could warn drivers when vehicles ahead of them suddenly brake. iStockphoto.com hide caption

Ryan Nuckle helped found New York City's Ghost Bike Project in 2005, after three cyclists were killed in a single month. Nellie Large for NPR hide caption

Many of the items in Kabul's Bush Bazaar are food and cleaning supplies that have presumably been stolen from NATO deliveries to Afghanistan. Sean Carberry/NPR hide caption