Alert circle: San Diego Zoo elephants show off their earthquake defense superpowers

Watch this incredible footage of a herd of African elephants at the San Diego Zoo Safari Park creating an 'alert circle' during the 5.2 magnitude earthquake that occurred on Monday morning in southern California. The footage was posted on the Park's Instagram, with the following explanation:

Elephants have the unique ability to feel sounds through their feet and formed what is known as an 'alert circle' during the 5.2 magnitude earthquake that shook Southern California this morning.

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