Learn to Listen, Listen to Learn Video Photo credits Book 1, Lecture 6: Acid Rain Ranglen/Shutterstock, romakoma/Shutterstock, IM_photo/Shutterstock, zentilia/Shutterstock Book 1, Lecture 7: Archaeological Dating Methods Anton_Ivanov/Shutterstock, Enrico Bortoluzzi/Shutterstock Book 1, Lecture 9: The Near Side of the Moon AstroStar/Shutterstock, Sedthachai stock/Shutterstock Book 2, Lecture 6: Two 21st Century Eco-Heroes Bendiksby, Terje/EPA/Newscom, GIANLUIGI GUERCIA/AFP/GETTY IMAGES/Newscom, Presselect/Alamy, PAUL BUCK/EPA/Newscom Book 2, Lecture 7: Paging Robodoc: Robots in Medicine Mrs_ya/Shutterstock, Adam Vilimek/Shutterstock, Kotin/Shutterstock, megastocker/Shutterstock Book 2, Lecture 8: How to Look at Art Shots Studio/Shutterstock, Ljupco Smokovski/Shutterstock Book 2, Lecture 9: Hall’s Classification of Cultures popocorn/Shutterstock, michaeljung/Shutterstock Book 2, Lecture 10: Earthquakes: Can they be predicted? Mopic/Shutterstock, Africa Studio/Shutterstock