1. Australian Forests

In ancient woodlands, a crocodile relies on sound to protect her babies, koalas release powerful roars, and an enchanting frog choir communes.

2. The Himalayas

Mountains act as a huge echo chamber for elusive creatures—like snow leopards—who use the landscape to amplify their rarely heard love songs.

3. The Rainforests

In one of the richest soundscapes, howler monkeys attempt to out-voice each other and sloths break their silence to search for mates.

4. The Pacific

Whale songs and dolphin clicks hold hidden meaning in an underwater world full of clever acoustic tricks.

6. Polar Worlds

In subzero conditions, emperor penguins use custom calls to find their families. After dark, the northern lights make mesmerizing music.

7. African Deserts

Silence may seem golden in the desert, but secret sounds connect curious meerkats—and tip off eavesdropping predators like cobras and eagles.

8. Atlantic Coasts

Where land meets sea, rockhopper penguins, orca whales, and elephant seals find incredible ways to cut through the chaos.

9. Winter Woodlands

In North America's forests, a snowy game of hide-and-seek unfolds between foxes and voles. When seasons change, elk strike up a sonic rivalry.

10. African Water Worlds

The Okavango Delta is awash with sound. And locals—from pied kingfishers to hippos—tune in to life above and below the water to survive.

11. Shallow Seas

New technology reveals a raucous symphony of pops and squeaks in an underwater amphitheater full of flirtatious fish and graceful manatees.

12. Listening to Our Planet

Meet the scientists studying sound around the globe to help stop the rapid progression of climate change and wildlife endangerment.