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The best-known and controversial archaeological claims for early human entry into the Americas are from the Calico Hills in California (originally thought to be 80,000–50,000 years old or even older), Pedra Furada in Brazil (40,000−20,000 years old) and Old Crow in the Yukon Territory of Canada.

However, the interpretations of site context, the nature of the stone items, and the human ‘signature’ on fossil faunas offered in support of these claims have been criticized.

Radiocarbon Basics Carbon comes in three “varieties” or isotopes: C is 5,730 years.

Because carbon is expected to be thoroughly mixed throughout the biosphere, atmosphere, and oceans, living organisms (which continually “take in” carbon throughout their lifetimes) are expected to have the same C in their bodies begins to decrease.

Evolutionists have long used the carbon-14, or radiocarbon, dating technique as a “hammer” to bludgeon Bible-believing Christians.

A straightforward reading of the Bible describes a 6,000-year-old universe, and because some carbon-14 (C) age estimates are multiple tens of thousands of years, many think that the radiocarbon method has soundly refuted the Bible’s historical accuracy.

Ancient humans settled in North America around 130,000 years ago, suggests a controversial study — pushing the date back more than 100,000 years earlier than most scientists accept.

The jaw-dropping claim, made in Nature, is based on broken rocks and mastodon bones found in California that a team of researchers say point to human activity.

This article will answer several of the most common creationist attacks on carbon-14 dating, using the question-answer format that has proved so useful to lecturers and debaters. Answer: Cosmic rays in the upper atmosphere are constantly converting the isotope nitrogen-14 (N-14) into carbon-14 (C-14 or radiocarbon).

In these cases, the findings could be explained as the outcome of geological or biological processes that superficially mimic human-made items, or the associations of the dated sediments with the artefacts are questionable.

Time will tell whether this evidence will bring a paradigm change in our understanding of processes of hominin dispersal and colonization throughout the world (including in what now seems to be a not-so-new New World).

Their contention, if correct, would force a dramatic rethink of when and how the Americas were first settled — and who by.

Most scientists subscribe to the view that Homo sapiens arrived in North America less than 20,000 years ago.