A team of specialists that included scientists from Siberia, the Urals, and the University of Arizona, USA, conducted radiocarbon dating of the teeth and bones of ancient porcupines found in the caves of Gorny Altai and the Urals. They established that these thermophilic animals lived in these territories up to 30,000 – 40,000 years ago and died out with the onset of the Last Glacial Maximum. The results of the research were published in the latest issue of Quaternary Science Reviews, one of the most prestigious journals in the earth sciences.
All this time, the age of ancient porcupines remained unknown, because the method of dating available to scientists required a large quantity of material for analysis.
Therefore, we were only now able to reconstruct the past and establish the age of ancient mammals. This happened thanks to the close scientific collaboration of scientists from Russia and the US. The University of Arizona conducted a direct radiocarbon dating of porcupine bones and teeth with an accelerator mass spectrometer. This method requires a minimum amount of material (less than the fingernail of the little finger) but is an accurate way to determine the geological age.
The results of the study showed that the fossils of porcupines living in the area of the modern Urals are more than 40,000 years old. Their Siberian relatives were significantly younger, from about 30,000 – 40,000 years ago. In the area that is now Russia, porcupines lived during an interstadial period, between two glacial maxima. According to the authors of the article, about 27,000 years ago the cooling began, which changed the situation in the Altai Mountains: forests decreased, the temperature and precipitation decreased, and the area occupied by grasses and bushes and the like increased. The conditions became unsuitable for the habitation of thermophilic mammals, and as a result at this time the porcupines permanently disappeared from the region.
More information about the results of the research can be found in the journal Quaternary Science Reviews.