“Where do we go when we die?” That might be a subject best left to the philosophers. But what about other burning questions like, “What happens to astronauts if they die in space?” or “Do fingernails grow after I’m dead?” Mortician Caitlin Doughty joins host Krys Boyd to tackle the interesting and icky questions posed by children about a still-taboo subject, which she writes about in “Will the Cat Eat My Eyeballs? Big Questions from Tiny Mortals about Death.”