Answer · confidence: partial
When did people first arrive in the Americas, and how has the answer changed?
Research question: When were the Americas first peopled, and how has the accepted answer changed with new evidence?
The records show that scientists still do not know when people first entered the New World, after more than a century of debate 2. The accepted picture has moved earlier: the Clovis consensus ended after older sites such as Monte Verde in southern Chile were discovered, which led to the early peopling theory 23, while the older late-arrival view placed a small group entering via the Bering Strait about 14,000 to 13,500 years ago 21. Sites such as White Sands, New Mexico, have been dated to about 23.0 to 21.0 thousand years ago 17, and 2025 radiocarbon dates support that age 16, though sceptics have questioned the prints' authenticity and dating 20 and the original authors have replied 22. Other sites, including footprints on Canada's Pacific coast about 13,000 years old 11 and human presence in Patagonia reaching about 15,000 years ago 12, add to the evidence. The newest fact in the file dates to 2025 16, roughly a year before October 2026.
Checked 2026-10-20. Only documented and supported facts are used.
Dig deeper on this questionSources
[1] supported
A discovery of Folsom weapons and a first camp ground pushed definite knowledge of American life back to a new and earlier stage.
"The discovery pushes definite knowledge of Ameri American - can American life back to a new and earlier stage."Image 5 of The Indian leader (Lawrence, Kan.), May 1, 1936
[2] supported
The document says that, after more than a century of debate, scientists still do not know when people first entered the New World.
"After more than a century of discovery and debate and nearly two centuries after Thomas Jefferson’s speculation that North American Indians and northern Asiatics must have had a common origin (see Wilmsen 1965), we still do not know when man entered the New World."The Pleistocene Archaeology of Beringia (1987)
[3] documented
People may have migrated to southern North America, but evidence of their presence there before the peak of the Wisconsin glaciation was disputed at the time.
"It is possible that he migrated to southern North America, although evidence for the presence of man there prior to the peak of the Wisconsin glaciation is at present in dispute."Upper Pleistocene Radiocarbon-Dated Artefacts from the Northern Yukon (1973)
[4] supported
The Basket Makers were considered the oldest known Indians in the southwest, dating to no older than about 1500 or 2000 B.C.
"The oldest Indians known, the Basket Makers, are considered not older than 1500 or 2,000 B. C. in the southwest."Image 5 of The Indian leader (Lawrence, Kan.), May 1, 1936
[5] supported
Claims of human presence in the Americas dating to 200,000 years or more, and more modest earlier claims, were not accepted in critical reviews.
"Two hundred thousand years or more are claims for greatest antiquity (Budinger 1983; Irving 1985; Steen-Mclntyre et al. 1981), but neither these nor the more modest claims of others (Bryan 1978; MacNeish 1976, 1978, 1979; Morlan 1980) have been accepted in critical reviews (Dincauze 1984; Owen 1984; Waters 1985)."The Pleistocene Archaeology of Beringia (1987)
[6] supported
The 1944 article argued that the first arrival was at least 20,000 years ago, with the possibility of an even earlier arrival about 50,000 years ago.
"We have no doubt it was at least 20.000 years ago."Image 70 of Detroit evening times (Detroit, Mich), May 7, 1944, (FINAL, THE AMERICAN WEEKLY)
[7] supported
The author suggested there were undoubtedly various waves of immigrants contributing to America's prehistoric population.
"There were undoubtedly various waves of immigrants contributing to America’s prehistoric melt melting - ing melting pot."Image 5 of The Indian leader (Lawrence, Kan.), May 1, 1936
[8] supported
Scientists of the time asked whether people reached the New World about 50,000 years earlier, before the last Ice Age, rather than only about 20,000 years ago.
"Or did he arrive in the New World about 50,000 years earlier, before the last Ice Age?"Image 70 of Detroit evening times (Detroit, Mich), May 7, 1944, (FINAL, THE AMERICAN WEEKLY)
[9] supported
Hearths at the Debert site associated with Clovis artifacts contained spruce charcoal, which MacDonald read as evidence that firewood was readily available.
"MacDonald (1968) determined that hearths associated with Clovis artifacts at the site contained spruce charcoal and suggested that firewood and kindling were readily available."Late Pleistocene archaeology and ecology in the far Northeast (2012)
[10] supported
The Debert evidence is interpreted as pointing to a late Allerod warm period with a spruce forest, not the treeless Younger Dryas tundra, which bears on when first occupation occurred.
"This interpretation is not compatible with the sparsely treed or tree- less tundra environment postulated for the Younger Dryas at about 10,600 '"‘C yr BP but more in keeping with the preceding late Allerod period when a spruce forest was es- tablished in the area"Late Pleistocene archaeology and ecology in the far Northeast (2012)
[11] documented
Human footprints were found impressed into a 13,000-year-old paleosol buried beneath beach sands at archaeological site EjTa-4 on the Pacific coast of Canada.
"During subsurface testing, we uncovered human footprints impressed into a 13,000-year-old paleosol beneath beach sands at archaeological site EjTa-4."Terminal Pleistocene epoch human footprints from the Pacific coast of Canada (2018)
[12] supported
Human presence in southern Patagonia can be traced back as far as about 15,000 years ago, with roughly 3,500 years of coexistence with extinct megafauna.
"intheareacanbetracedbackasfaras*15kyr[2,10]withaperiodof*3500yearsofcoexis-"A late Pleistocene human footprint from the Pilauco archaeological site, northern Patagonia, Chile (2019)
[13] documented
The footprint site has yielded 29 footprints of at least three different sizes.
"To date, our investigations at this site have revealed a total of 29 footprints of at least three different sizes."Terminal Pleistocene epoch human footprints from the Pacific coast of Canada (2018)
[14] documented
Mexican footprints dated to about 40,000 years old are cited as American evidence, though their authenticity is contested.
"InAmerica,Mexican40,000yearsoldfootprints,thoughcontested[33],areofasimilar"A late Pleistocene human footprint from the Pilauco archaeological site, northern Patagonia, Chile (2019)
[15] supported
Sea level near Calvert Island was 2-3 m lower than present between 14,000 and 11,000 years ago, which led researchers to search for archaeological remains from that period beneath intertidal beach sediments.
"Drawing upon existing geomorphic information that sea level in the area was 2-3 m lower than present between 14,000 and 11,000 years ago, we began a systematic search for archaeological remains dating to this time period beneath intertidal beach sediments."Terminal Pleistocene epoch human footprints from the Pacific coast of Canada (2018)
[16] supported
New radiocarbon dates from palustrine mud span more than 23.6 thousand to about 17.0 thousand calibrated years before present, supporting an LGM age for the tracks.
"The stratigraphic data along with 26 additional radiocarbon dates on palustrine mud determined by two labs independent of the original investigations document an aggrading lake/wetland/stream record that includes the tracks and spans >23.6 thousand years to ~17.0 thousand calibrated years before present, providing another line of evidence further supporting the validity of an LGM age for the track"Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico (2025)
[17] documented
Dates from Gypsum Overlook of about 22.4 to 20.7 ka cal B.P. correlate stratigraphically with the alluvial strata encasing the tracks at WHSA Locality 2, dated about 23.0 to 21.0 ka cal B.P.
"New dates of ~22.4 ka to 20.7 ka cal B.P. from Gypsum Overlook stratigraphically correlate to and are within the elevation range of the alluvial strata that encase the human tracks in WHSA Locality 2 dated ~23.0 ka ago to ~21.0 ka cal B.P."Paleolake geochronology supports Last Glacial Maximum (LGM) age for human tracks at White Sands, New Mexico (2025)
[18] supported
Dillehay registered human footprints at the Monte Verde locality, located near Pilauco in Chile.
"registeredtheexistenceofhumanfootprintsinthelocalityofMonteVerdelocatednearby"A late Pleistocene human footprint from the Pilauco archaeological site, northern Patagonia, Chile (2019)
[19] supported
The Pilauco human footprint adds a new and independent line of evidence on the colonisation of northern Patagonia, supporting the Monte Verde findings that have been defended for more than 40 years.
"continuouslydefendedformorethan40yearsbynowbasedonscientificfindingsfromthe"A late Pleistocene human footprint from the Pilauco archaeological site, northern Patagonia, Chile (2019)
[20] documented
Sceptics have questioned whether some of the White Sands prints are genuine, whether they are associated with the mammal tracks, and whether they were dated correctly.
"detailing questions recently raised in print regarding the genuineness of at least some of the prints, their association with the mammal tracks, and the dating of these phenomena"Ancientness of New Mexico Human Footprints Confirmed (2024)
[21] supported
The late peopling theory held that a small group of humans from Siberia entered the Americas via the Bering Strait roughly 14,000 to 13,500 years ago.
"Sostuvo que, hace aproximadamente entre 14 000 [ 1 ] y 13 500 años [ 1 ] [ 2 ] antes de nuestra era, un pequeño grupo de seres humanos procedentes de Siberia ingresó al continente americano por el estrecho de Bering"Teoría del poblamiento tardío
[22] supported
The original authors of the White Sands footprint study have replied to the sceptics' objections about the time depth of the evidence.
"Now, the original authors have replied to the sceptics' objections concerning time depth"Ancientness of New Mexico Human Footprints Confirmed (2024)
[23] supported
The Clovis consensus ended after older archaeological sites with human presence, including Monte Verde in southern Chile, were discovered, leading to the early peopling theory.
"El consenso llegó a su fin tras el hallazgo en América de yacimientos arqueológicos con presencia humana mucho más antiguos, entre ellos Monte Verde en el sur de Chile"Teoría del poblamiento tardío
[24] supported
In 2016, human remains about 14,550 years old were found in Florida, adding evidence of pre-Clovis presence.
"en 2016 se encontraron en Florida restos humanos de 14 550 años de antigüedad."Teoría del poblamiento tardío