2 In 1984 Katy spent a week working with elephants at a zoo in Oregon, USA. as she was in the plane on her way home to Ithaca, New York, Katy couldn't hear the plane's engines. But she could feel them in her body. the engines reminded her of how she felt around the elephants. Katy knew that elephants could communicate with each other. she wondered if the elephants at the zoo were communicating with each other in sounds that people couldn't hear.