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Canada is having its worst fire season in modern history. The fires have burnt more than 20 million acres, casting hazardous smoke over parts of the U.S. and stretching Canadian firefighting resources thin. Public officials and many news headlines have declared the fires as "unprecedented," and in the modern-sense they are. But NPR climate correspondent Nate Rott has been talking to researchers who focus on the history of wildfire in Canada's boreal forests and they say the situation is not without precedent.Want more stories on the environment? Drop us a line at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

In the Port of Baltimore, a ship is docked that hasn't transported passengers for more than 50 years. It's the NS Savannah and it's designated a National Historic Landmark. That's because it was the first—and only—nuclear-powered passenger ship to have ever been built. Science correspondent Geoff Brumfiel tells us about his recent tour of the ship and why it was a symbol of peace in it's time. To see more pictures of Geoff's visit to the NS Savannah, including one from 1962 when the ship was operational, click this link. Want to learn more about nuclear power? Email us at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

20 years ago, the cult classic movie 'The Core' was released in theaters. From the start, it's clear that science is more a plot device than anything — but some scientists love it anyway. Today, Scientist in Residence Regina G. Barber has a friendly laugh with geologist Jackie Caplan-Auerbach about the creative liberties writers took to make the movie's plot work.P.S. We're biased here, but we don't think you need to have seen the movie to enjoy this episode. This edition of our periodic 'movie club' series, where we separate fact from fiction, was highly requested by you, our audience. If you want us to do the same for another movie you love, write us! We're at shortwave@npr.org.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy