Miles of Ice Age art discovered along South American river

A 15-kilometer "Sistine Chapel" of Ice Age rock art has been found along the Colombian Amazon. It includes depictions of now-extinct animals like mastodons, giant sloths, and paleollamas. Via LiveScience:

Indigenous people likely started painting these images at the archaeological site of Serranía La Lindosa, on the northern edge of the Colombian Amazon, toward the end of the last ice age, about 12,600 to 11,800 years ago.