Mary Roach is a New York Times bestselling author and acclaimed science writer who once thought science was boring. She has traveled the world and written fascinating, humorous books about the human body and its curiosities. Today she discusses three of them with Sarah: "Stiff," "Six Feet Over," and her latest, "Replaceable You." They also talk about how our culture got so squeamish about dead bodies, and where we might go after we die.

Learn more about Mary Roach and her wonderful books at https://www.maryroach.net/

For more information and to become an organ donor, please visit https://www.organdonor.gov/

It's time for the annual holiday episode, and this year we're revisiting a few of our favorite conversations from 2025. (It was tough to pick, they are all favorites!) You'll hear excerpts from Sarah's interviews with puppeteer Basil Twist; death educator Joél Simone; poet Danusha Laméris; journalist Oliver Burkeman; and writer-illustrator duo Suzy Hopkins and Hallie Bateman. Each of these guests brought a new perspective on death and grief to our podcast. We are grateful to all of our listeners this year. May your holidays bring you peace.

Social worker Lisa Keefauver was just 40 years old when her husband died from cancer in her arms. She has since become an outspoken grief activist, helping people identify, understand, live with, and talk about their grief through her book and podcast, "Grief Is a Sneaky Bitch." Lisa tells Sarah why scuba diving is a metaphor for life, how to metabolize your grief over a lifetime, and what to do when grief catches you off guard in the most unexpected moments.

You can find more information on Lisa's work at www.lisakeefauver.com