Astrophysicist Richard Gaitskell, from Brown University, leads a team hunting particles of dark matter about a mile beneath Earth's surface. No luck so far, but Gaitskell is still hopeful. Chet Brokaw/AP hide caption

toggle caption Chet Brokaw/AP

Oglala Sioux leaders and city officials at a press conference following the incident discuss possible charges, which could include child abuse, hate crimes and assault. Charles Michael Ray/South Dakota Public Broadcasting hide caption

toggle caption Charles Michael Ray/South Dakota Public Broadcasting

Cheryl Miller's driver's license was among the evidence collected from the car she and Pamela Jackson were last seen in. The two South Dakota girls disappeared in 1971. Now, authorities say it appears they accidentally drove into a creek. It wasn't until last year that low waters revealed the vehicle. South Dakota Attorney General's office/AP hide caption

toggle caption South Dakota Attorney General's office/AP

Kansas Board of Education members look over language for a science textbook in 2007. The fight over the teaching of evolution has been particularly fierce in Texas, which because of its size influences many textbook publishers. Charlie Riedel/AP hide caption

toggle caption Charlie Riedel/AP

An undated photo provided by the South Dakota Attorney General's Office shows a Studebaker found this week in a creek near Elk Point, S.D. Two teenage girls from the area were last seen May 29, 1971, driving a car like it. Remains found in the vehicle may be those of the two teenagers. AP hide caption

toggle caption AP

NPR thanks our sponsors

Become an NPR sponsor