Before revision: The genetic history of the Indigenous peoples of the Americas is divided into two distinct periods: the initial peopling of the Americas during about 20,000 to 14,000 years ago (20–14 kya), and European contact, after about 500 years ago.
After revision: The genetic history of the Indigenous peoples of the Americas is divided into two distinct periods: the initial peopling of the Americas from about 20,000 to 14,000 years ago (20–14 kya), and European contact, after about 500 years ago.