488K views · 24K reactions | A wolf pack’s howls can carry up to 10 miles—a call to unite before the hunt  Each voice weaves a bond of survival, loyalty, and instinct. | National Geographic Animals | Facebook

What’s the significance of the howl to a wolf? “They use it to mark territory. So, they howl together as a pack… They also will howl at intruders to get them to leave,” says Peggy Callahan, who runs the Wildlife Science Center in Minnesota. https://cbsn.ws/3XBwkeu | 60 Minutes