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    Scientific controversy concerning carbon 14 dating

    Biostratigraphy: One of the first and most basic scientific dating methods is also one of the easiest to understand.Layers of rock build one atop another — find a fossil or artifact in one layer, and you can reasonably assume it’s older than anything above it.For decades, radiocarbon dating has been a way for scientists to get a rough picture of when once-living stuff lived.

    Today, the radiocarbon-14 dating method is used extensively in environmental sciences and in human sciences such as archaeology and anthropology.

    Radiocarbon dating may only be used on organic materials.

    Typically (6): The above list is not exhaustive; most organic material is suitable so long as it is of sufficient age and has not mineralised - dinosaur bones are out as they no longer have any carbon left.

    When it comes to determining the age of stuff scientists dig out of the ground, whether fossil or artifact, “there are good dates and bad dates and ugly dates,” says paleoanthropologist John Shea of Stony Brook University.

    The good dates are confirmed using at least two different methods, ideally involving multiple independent labs for each method to cross-check results.

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