When the ground started shaking, a herd of African elephants at the San Diego Zoo Safari Park formed a protective barrier, known as an "alert circle," around their youngest. Experts say it's a demonstration of their sharp instincts,

When a 5.2 magnitude earthquake shook their enclosure on Monday, a group of African elephants at the San Diego Zoo Safari Park instinctively sprang into action to protect each other. The moment was caught on the camera as the quake rocked Southern California,