On the final episode of “Animal,” Sam Anderson travels to Mexico’s Yucatán Peninsula to meet with a creature he's long been afraid of: bats.For photos and videos of Sam's journey to the Yucatán, and to listen to the full series, visit nytimes.com/animal. You can search for “Animal” wherever you get your podcasts.  Subscribe today at nytimes.com/podcasts or on Apple Podcasts and Spotify. You can also subscribe via your favorite podcast app here https://www.nytimes.com/activate-access/audio?source=podcatcher. For more podcasts and narrated articles, download The New York Times app at nytimes.com/app.