A herd of African elephants instinctively formed an "alert circle" to protect the younger elephants at the San Diego Zoo Safari Park as a 5.2-magnitude earthquake shook Southern California on Monday.

very old now - and they’re smaller than the fold mountains that are still growing - like in South America’s Andes, or the world’s tallest mountain, Everest, in the Himalayas in Asia.

Hummingbirds are often highly aggressive and territorial, but in the tough terrains of the Andes Mountains, BGSU researchers found a species of hummingbird is living cohesively with its peers.