The use of ultrasound by bats wasn't discovered until the 1930s
{"Image DocumentName": "The use of ultrasound by bats wasn\u2019t discovered until the 1930s", "Image ImageDescription": "Donald Griffin suggested bats may use ultasonic echoes to detect prey. Designed an experiment where he hung prey were hung on strings in a room with obstacles all around a dark room. When loud sounds were played, bats navigated perfectly. When bombarded with ultrasound, bats began to collide with obstacles and crash to the floor, until the sound was turned off. Kenneth Roeder realized that moths may also be able to hear in the same frequency of bats to avoid being eaten.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}