Two separate rock art depictions of armored horses were found on the Purgatoire River in southeast Colorado.
American West Archaeology & Paleontology
Cultural changes during this period, including the earliest evidence for cultivation of corn and cotton, occur concurrently with changes in available moisture.
Two lightning-ignited fires roared through forests of pinon pine, Utah juniper and Gambel oak in Mesa Verde National Park, scorching 21,061 acres in the park and another 7,786 acres nearby.
The purchase preserves permanent public access via County Road 42 to Petroglyph Hill, an important archaeological site on an adjacent 780-acre parcel purchased last year.
Instead of human activity killing off megafauna, Grayson points to climate shifts during the late Pleistocene epoch, which ended about 10,000 years ago, and subsequent changes in weather and plants as the likely culprits.