Web extra: Actor Alex Sharp talks to Jane Pauley about experiencing the fear, anxiety and trauma of his autistic character in the Broadway hit, “The Curious Incident of the Dog in the Night-Time.” Source

The De Young, one of San Francisco’s fine art museums, now has two robots that open the museum up to those who cannot attend, including the physically handicapped. John Blackstone reports on the state-of-the-art in museum tour guides, and interviews robotics activist Henry Evans, a former Silicon Valley executive who is now almost completely paralyzed, and who worked with the museum to make touring by robot a reality. Source

The early American photographer Robert Cornelius – credited with taking the very first photographic self-portrait in America – was born in Philadelphia 206 years ago today. Charles Osgood reports. Source

Steve Fuller is the Winter Caretaker of Yellowstone National Park – one of just a handful of hearty souls who remain in the wilderness long after the summer tourists have gone. He’s stuck out the solitary existence of the position for 42 years, ever since the winter of 1973. Lee Cowan reports. Source

Russian troops have been assembling near the border with Ukraine as tension rises almost 7 years after Putin’s annexation of Crimea. Source

In the first hours of questioning, Melissa Calusinski, 22, tells detectives, “I had nothing to do with it.” “I did not do anything.” The day care worker was first questioned by Lake Zurich, Ill., police detectives two days after the death of 16-month-old Ben Kingan, a toddler in her care. Source

Earlier this month, the Titans landed one of the top pass rushers in free agency in Dupree, a former Pittsburgh Steelers edge rusher who should make a big difference on a defense that managed just 19 sacks in 16 games last season. Source

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Watch excerpts from correspondent John Blackstone’s 2005 interview with actor Leonard Nimoy, who created the character of Mr. Spock on “Star Trek.” He talks about what the role meant to him and his career; about competition among the show’s ensemble cast; how fans kept the sci-fi series alive through syndication and beyond; and about his reaction to the release of “Star Wars.” Source

Beau Willimon joins “CBS This Morning: Saturday” to tell us more about the show and why it’s not about politics. Source