Thursday

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David Letterman taped his final Late Show with David Letterman on Wednesday. Jeffrey R. Staab/CBS via AP hide caption

itoggle caption Jeffrey R. Staab/CBS via AP
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Wednesday

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Terry Gross and Marc Maron took the stage at WNYC's RadioLoveFest on May 6. During their conversation, Gross says, Maron "occasionally looked a little nervous or frustrated when he thought I was unforthcoming — or worse yet, being dull --€” but mostly, he looked emotionally present, curious and attentive." Rebecca Greenfield/Brooklyn Academy of Music hide caption

itoggle caption Rebecca Greenfield/Brooklyn Academy of Music
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Tuesday

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Monday

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The German service robot Toomas was designed to welcome customers and help them find items in a store. Joerg Sarbach/AP hide caption

itoggle caption Joerg Sarbach/AP
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Saturday

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Ethan Hawke plays an Air Force commander engaged in drone warfare in Andrew Niccol's Good Kill. Lorey Sebastian/IFC Films hide caption

itoggle caption Lorey Sebastian/IFC Films
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Friday

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B.B King in 1996. David Redfern/Redferns hide caption

itoggle caption David Redfern/Redferns
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Thursday

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A helicopter flies over a section of Baltimore affected by riots. Richard Rothstein writes that recent unrest in Baltimore is the legacy of a century of federal, state and local policies designed to "quarantine Baltimore's black population in isolated slums." Patrick Smith/Getty Images hide caption

itoggle caption Patrick Smith/Getty Images
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Wednesday

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Tom Brokaw served as the anchor and managing editor of NBC Nightly News from 1982 until 2004. Virginia Sherwood/NBC hide caption

itoggle caption Virginia Sherwood/NBC
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Tuesday

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Photographer Sally Mann drives with her greyhound, Honey, in the early 2000s. Michael S. Williamson/Courtesy of Michael S. Williamson hide caption

itoggle caption Michael S. Williamson/Courtesy of Michael S. Williamson
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Monday

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Astronomer Chris Impey examines the possibilities of the universe in his new book Beyond. "I like the idea that the universe — the boundless possibility of 20 billion habitable worlds — has led to things that we can barely imagine," he says. In the 1970s, NASA Ames conducted several space colony studies, commissioning renderings of the giant spacecraft which could house entire cities. Rick Guidice/NASA Ames Research Center hide caption

itoggle caption Rick Guidice/NASA Ames Research Center
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