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A federal judge ruled that the CDC can\u2019t mandate mask usage on public transportation, and France\u2019s president Emmanuel Macron is pulling out all the stops in his bid to win reelection against his extremist challenger, Marine Le Pen. Stephen sends a probe deep into the mind of America\u2019s favorite astrophysicist to find out what questions about the universe are causing Neil deGrasse Tyson to lose sleep. And former Late Show writer Emmy Blotnick comes back to the Ed Sullivan Theater for a stand-up comedy set that\u2019s full of great advice for new dog owners, and anyone venturing back out into the world after two years of quarantine. \nLearn more about your ad choices. Visit megaphone.fm/adchoices