 Accelerator mass spectrometry (AMS) dating gives dates for level IV of between 33 and 23 thousand years before the present (kyr BP)—the researchers felt that the uncertainties at this time depth made calibration impractical.They suggest occupation until at least 28 kyr BP and possibly 24 kyr BP.No fossil remains have been found that would allow identification pointing to either Neanderthal or anatomically modern human inhabitants, nor associated with findings of a modern human in a site at nearby Abrigo do Lagar Velho, Portugal of 24,500 years ago who may have featured Neanderthal genetic admixtures, although Mousterian culture normally is identified with Neanderthals in Europe.