Native Americans
Artifacts of a pre-Clovis tradition from the Gault site, Texas
A 2018 paper by Thomas Williams and coworkers documents a Native American group that existed as early as 16,000 years ago.
Did humans approach the southern tip of South America more than 18,000 years ago?
An article by Tom Dillehay and coworkers describes the archaeology of Monte Verde I, preserving artifacts together with burned features.