Summary:

- Scientists have discovered a hidden "roar" that lions use to communicate with each other. This roar is not audible to the human ear, but it can be detected using special equipment.
- The researchers believe that understanding this hidden roar could help in the conservation efforts for lions, as it provides insights into their behavior and communication patterns.
- By studying the hidden roar, scientists hope to learn more about how lions interact with each other, which could lead to better strategies for protecting and preserving these majestic animals.