Last week, Fox's and National Geographic's new Cosmos series set a new milestone in television history. According to National Geographic, it was the largest global rollout of a TV series ever, appearing on 220 channels in 181 countries, and 45 languages. And, yes, this is a science show we're talking about. You will have to actively resist the force of gravity in order to lift up your dropped jaw, and restore a sense of calm to your stunned face.

At the center of the show is the "heir apparent" to legendary science popularizer and original Cosmos host Carl Sagan: astrophysicist Neil deGrasse Tyson, who we interview on this week's episode about what it's like to fill Sagan's shoes. Tyson discusses topics ranging from what we know now about the Cosmos that Sagan didn't to why science seems to have gotten so supercool again.

This episode also features a discussion of whether bringing extinct species back to life is a good idea, and of new research suggesting that climate change led to the rise of Genghis Khan.

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