Inyan Pedersen, 34, with her son Knowledge. Doctors scheduled Pedersen to deliver her two younger children by C-sections because the closest birthing center is two hours away. Misha Friedman for KHN and NPR hide caption

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Misha Friedman for KHN and NPR

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

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Chet Brokaw/AP

A Physicist Dreams Of Catching Dark Matter In The Act

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Federal Judge Says South Dakota Officials Violated Native American Families' Rights

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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

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Charles Michael Ray/South Dakota Public Broadcasting

Authorities Probe Alleged Hate Crime Against Native American Kids

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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

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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

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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

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AP

After training, teachers and other staffers in South Dakota could choose to bring guns with them to school if their districts want to set up "sentinel" programs. Jim Urquhart /Reuters /Landov hide caption

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Jim Urquhart /Reuters /Landov