Jenna Cook created this poster when she left her home in Massachusetts in 2012 to return to Wuhan, China, where she had been abandoned as a baby. She hoped a relative might see the poster. She ended up meeting with 50 families who thought she might be their daughter. Courtesy of Jenna Cook hide caption

toggle caption Courtesy of Jenna Cook

Her Search For Her Mother Touches An Entire Chinese City

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Pinterest has created a database of "things in the world that matter to human beings," says Alexis Madrigal. Pinterest hide caption

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Can Pinterest Compete With Google's Search?

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Facebook CEO Mark Zuckerberg speaks at Facebook headquarters in Menlo Park, Calif., on Tuesday. Jeff Chiu/AP hide caption

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'It's About Time': Facebook Reveals New Search Feature

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