A pair of tweezers holds a graphene transistor fabricated on a silicon wafer. An I-Corps team from the University of Pennsylvania is working on scaling up their cheaper method of making high-quality graphene, an extremely strong, conductive material one atom thick that was the subject of a Nobel Prize last year.

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Dwayne Stenstrom and his wife, Rose, live on South Dakota's Rosebud reservation, where they raised six children. Also pictured is their granddaughter. John Poole/NPR hide caption

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Paranormal investigator Noah Voss points a video camera at an electromagnetic frequency device to record any abnormal activity at the Sun Prairie Cemetery in Sun Prairie, Wis.

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Theodore Hardeen (right) poses with brother Harry Houdini around 1901. Although Hardeen was the less-famous brother, he was also a magician and escape artist who continued to perform Houdini's routines after his death.

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A truck driver cleans his windshield at a filling station in Milford, Conn. The long hours, weeks away from home and mediocre pay contribute to the trucking industry's shortage of an estimated 125,000 drivers.

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Tents pitched at the Occupy Wall Street encampment at Zuccotti Park in New York. The protests are part of a growing distrust in America of government and public institutions.

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