What sounds and signals evoke our planet? "Songs of the Earth" includes the voices of Bernie Krause, R. Murray Schafer, Pauline Oliveros, Douglas Kahn, Lotte Geeven, Phil Erickson, Bert Polches, Carol Dana, Ernst Karel, Helen Mirra, Cathy Wilson, Alison Guinness, John Ebel, Benjamin Zander, Jane Struss, and Thomas Peattie. The montage at the top of the hour comes from NASA's 1977 Voyager "Sounds From Earth" record. The program also includes a portion of "Bones of the Earth," a documentary by Chris Brookes and Paolo Pietropaolo about Gros Morne National Park in Canada. Produced by Anna Cataldo, Ari Daniel, Conor Gillies, Zack Ezor, Qainat Khan, Emile Klein, and Lisa Tobin. Editing help from Katherine Gorman and Erika Lantz. Artwork by Robert Beatty. From WBUR, Boston’s NPR News Station.