It’s Serious Eats’ science superstar J. Kenji Lopez-Alt with his new book, The Food Lab: Better Home Cooking Through Science. Mary Karr, author of The Art of Memoir, talks about the role of smell and taste in memory. Musician Sammy Hagar, author of Are We Having Any Fun Yet?, compares cooking to writing a song. James Nienhuis, a professor at the University of Wisconsin, explains what paintings show about the history of vegetable domestication. Jane and Michael Stern report on the High Desert Market Café in Bisbee, Arizona.