Americans are flocking to gyms and fitness classes. It wasn't always that way.

This episode was produced by Hady Mawajdeh, edited by Miranda Kennedy with help from Naureen Khan, fact-checked by Melissa Hirsch, engineered by Andrea Kristinsdottir and hosted by Jonquilyn Hill. Photo of an outdoor group fitness class by ANDREW CABALLERO-REYNOLDS/AFP via Getty Images.

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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We track our steps and our sleep, guzzle supplements and protein shakes, and even inject hormones – all in the name of wellness.

This episode was produced by Hady Mawajdeh, edited by Naureen Khan and Miranda Kennedy, fact-checked by Melissa Hirsch, engineered by Andrea Kristinsdottir, and hosted by Jonquilyn Hill. Photo by Jeffrey Greenberg/Universal Images Group via Getty Images.

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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Americans are investing billions in their health and wellness. What good do all these green powders and costly club memberships actually do?

This episode was produced by Hady Mawajdeh, edited by Miranda Kennedy, fact-checked by Melissa Hirsch, engineered by Matthew Billy, and hosted by Jonquilyn Hill. Image of a guest floating in a saline sensory deprivation pool at the Chiva Som Health Resort by Peter Charlesworth/LightRocket via Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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The US is well behind much of the world in building passenger rail, especially high-speed trains. But we do have one major advantage.

This episode was produced by Devan Schwartz, edited by Naureen Khan, fact-checked by Melissa Hirsch, engineered by Patrick Boyd with help from Andrea Kristinsdottir and hosted by Jonquilyn Hill. Photo by Robert Alexander/Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note ⁠here⁠. Listen to Explain It to Me ad-free by becoming a Vox Member: ⁠vox.com/members⁠. 

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From raising the tipped minimum wage to "no tax on tips," we look at the challenges of remaking tipped work.

This episode was produced by Peter Balonon-Rosen, edited by Miranda Kennedy, fact-checked by Melissa Hirsch, engineered by Patrick Boyd and hosted by Jonquilyn Hill. Photo by Lindsey Nicholson/UCG/Universal Images Group via Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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Summer. Time for pools, BBQs, and the beach read. But why do we read "summer books"?

This episode was produced by Avishay Artsy, edited by Amina Al-Sadi, fact-checked by Melissa Hirsch, engineered by Matthew Billy, and hosted by Jonquilyn Hill. Photo by Jakub Porzycki/NurPhoto via Getty Images. 

Further Reading: Bad Witches by H.B. Akumiah and Constance Grady's newsletter from Vox. Further listening:  Limousine podcast.

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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More and more of us are interacting with chatbots. Can we have real relationships with AI, and can AI teach humans to be better people?

This episode was a collaboration with Vox's Future Perfect team. It was produced by Denise Guerra, edited by Miranda Kennedy, fact-checked by Kim Slotterback, engineered by Patrick Boyd and hosted by Jonquilyn Hill. Photo by Frank Rumpenhorst/picture alliance via Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

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Beyoncé and Kendrick Lamar openly celebrate the American flag. But a lot of Black Americans feel differently. What does that tell us about identity today?

This episode was produced by Victoria Chamberlin, edited by Miranda Kennedy, fact-checked by Melissa Hirsch, engineered by Andrea Kristinsdottir and hosted by Jonquilyn Hill. Image of Kendrick Lamar performing at the Super Bowl LIX Halftime Show by Gregory Shamus/Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members.

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So many of us believe we understand what our pets are feeling. Are we fooling ourselves?

This episode was produced by Miles Bryan, edited by Miranda Kennedy and Naureen Khan, fact-checked by Melissa Hirsch, engineered byPatrick Boyd and hosted by Noam Hassenfeld. Photo by Kylie Cooper for The Washington Post via Getty Images.

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members.

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Unpacking the American rite of passage that so many children love — but that isn't right for everyone.

This episode was produced by Devan Schwartz, edited by Miranda Kennedy, fact-checked by Sarah Schweppe, engineered by Matthew Billy and hosted by Jonquilyn Hill. Photo by Maskot/Getty Images. 

If you have a question, give us a call on 1-800-618-8545 or send us a note here. Listen to Explain It to Me ad-free by becoming a Vox Member: vox.com/members. 

Learn more about your ad choices. Visit podcastchoices.com/adchoices