Lenore channelFrom Sterling Heights
Since physics can't predict exactly when a given atom will decay, we rely on statistical methods in dealing with radioactivity, and while this is an excellent method for a bazillion atoms, it fails when we don't have good sample sizes. A freshly killed seal, dated using Carbon, showed it had died years ago. Over time 14C decays to nitrogen 14N. Anatomically modern humans arrived in northern Spain around 42, to 43, years ago, and Neanderthals died out between 39, and 41, years ago. All carbon that was once in anything older than , radiocarbon years would have decayed; its age could not be determined.
Asked by: William Baker Answer Carbon 14 C14 is an isotope of carbon with 8 neutrons instead of the more common 6 neutrons. Several laboratories in the world are now equipped to perform a much improved radiocarbon dating procedure. An external error is calculated from the reproducibility of multiple exposures for a given target.