The Quelccaya Ice Cap in the heart of the Peruvian Andres,
is the largest tropical body of ice in the world.
The ice cap is at an average altitude of 5,470 meters (18,600 ft)
and spans an area of 44 square kilometers (17 miles).
As the ice cap is retreating,
it is exposing almost perfectly preserved plant specimens
dating back 5,200 years,
indicating that it has been more than 50 centuries
since the ice cap was smaller than it is today.