These are factors that impact the nature of the world from the highest mountain peak to the deepest ocean trench.

CNN: An SOS on World Oceans Day: Save our seas, save ourselves

The mountain's highest peak is the Guagua ("child" in Quechua), a two-hour hike from the town of Lloa, a one-hour drive south-west of Quito.

BBC: Scaling the Ecuadorean Andes

The avalanche on the western side of the mountain, America's highest peak, was first thought to have occurred on Thursday, the parks service said Sunday.

CNN: Avalanche recovery efforts suspended on Mount McKinley