A problem exists with the reliability of the findings relating human DNA to places in the exploration of human migration. More recently, where samples of populations or individuals alive are taken and proxied to the location the samples came from as a reliable means of exploring human migration. Such an approach risks reliability, as, at least since the industrial revolution, the ability of people's to move farther and farther means that the place they are currently in cannot be translated as the location their ancestors came from.

There is a means to increase reliability and that is by undertaking investigations that contextualise probability studies into how mobile differing social groups were in their particular life-span. Combine this data with DNA extraction from burials in a range of locations. DNA extracted from teeth in burials thus act as far more reliable time-capsules locating the DNA in place-time.