The Library Company reading room on Juniper Street in Philadelphia c. 1935, one of the group’s main locations from 1880 to 1935. The Library Company of Philadelphia Founding father Benjamin Franklin ...

Most people wouldn't think that it would take rigorous mathematical proof to show how many folds it takes to make a donut shape out of paper. Yet, no one could quite figure it out until recently. How ...

National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

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