Rhee talks to a student at a school in Washington, D.C. Manuel Balce Ceneta/AP hide caption

itoggle caption Manuel Balce Ceneta/AP

Mine No. 13 at Red Mountain Park is one of the older red ore mines in Birmingham, Ranger Eric McFerrin says. Patrick Barry /State of the Re:Union hide caption

itoggle caption Patrick Barry /State of the Re:Union

Institute for Marine Mammal Studies veterinary technician Wendy Hatchett takes a skin sample from a dead bottlenose dolphin that was found on Ono Island, Ala., and brought for examination to Gulfport, Miss., on Tuesday. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

An artist's conception of a high-speed rail car in California. A proposal to build the first segment of California's high-speed rail through the state's agricultural heart is raising questions. AP hide caption

itoggle caption AP

Roni Chambers, executive director of Go! Network (right), checks in Jennifer Barfield, 47, and her husband, Brian Barfield, 53, at a job networking meeting in downtown St. Louis. Whitney Curtis for NPR hide caption

itoggle caption Whitney Curtis for NPR

Leigh Ann Hester, now a police officer in the suburbs of Nashville, Tenn., is the first female soldier since World War II to receive the Silver Star medal for valor in combat. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Left: Brig. Gen. Wilma Vaught during her time serving in Vietnam; when she joined the military, she received training on how to put on makeup — but not how to fire a weapon. Right: An illustrated poster of Sgt. Leigh Ann Hester, the first woman since World War II to receive the Silver Star for valor. Both women are profiled in this series. Courtesy of Brig. Gen. Wilma Vaught; David Gilkey, NPR hide caption

itoggle caption Courtesy of Brig. Gen. Wilma Vaught; David Gilkey, NPR

Scientists from NASA's Kepler mission discovered 54 planets in so-called "habitable zones" in the Milky Way. The SETI Institute turned its telescopes toward those planets to listen. AP hide caption

itoggle caption AP

Some 16,000 years ago, people may have been curling up next to the fire with red foxes. iStockphoto.com hide caption

itoggle caption iStockphoto.com

An American black bear from the Kenai Peninsula in Alaska. A new study found that a bear's metabolism in hibernation drops by nearly 75 percent while its body temperature falls just slightly. Oivind Toien/Institute of Arctic Biology, University of Alaska, Fairbanks hide caption

itoggle caption Oivind Toien/Institute of Arctic Biology, University of Alaska, Fairbanks

Photographer Sally Mann and Larry Mann, in her home gallery in Lexington, Va., have been married for 40 years. Melissa Block/NPR hide caption

itoggle caption Melissa Block/NPR

Yelena Gaziyan has worked at TD Industrial Coverings for more than seven years and is now the work leader for sewing jeans. Courtesy of Motor City Denim hide caption

itoggle caption Courtesy of Motor City Denim