Recreating the sound of early 20th-century America
Naturalist Aldo Leopold took such detailed notes of the sounds he heard in 1930s Wisconsin — particularly bird calls — that researchers at the University of Wisconsin-Madison have been able to recreate what the environment sounded like back then
. At least, what it sounded like around Aldo Leopold's house. His notes, and the recreated sound, are allowing scientists to learn more about species migration and how industrialization has changed ecology.