25 at 250: A fossilized bison skull and the Friendship 7

The Smithsonian National Museum of Natural History has a new exhibit tracing the rise, near extinction and recovery of the bison. Museum director Kirk Johnson talks about a prehistoric skull at the centerpiece of the story and why it's important for American history. 

And, NASA's Artemis II mission made history this month by sending four astronauts farther from Earth than any other humans have been before. But moments like this echo the earliest days of American spaceflight in 1962, when John Glenn orbited the planet three times in a cramped capsule called the Mercury Friendship 7. Mike Neufeld, curator emeritus at the Smithsonian National Air and Space Museum, discusses the history and modern significance of the Friendship 7

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