"To Decode Elephant Conversation, You Must Feel The Jungle Rumble"

"The natural world is abuzz with the sound of animals communicating — crickets, birds, even grunting fish. But scientists learning to decode these sounds say the secret signals of African elephants — their deepest rumblings — are among the most intriguing calls any animal makes."

Bill McQuay and Christopher Joyce report for NPR's Morning Edition August 20, 2015.