 Well, I'm a biological anthropologist and I use DNA evidence, both ancient DNA and modern DNA, variation in Pacific, generally Pacific populations to try to understand not only population origins, but population diversity and how different people and different groups of people adapted to the new environments that they encountered. So I look at DNA evidence and I look at ancient DNA that we can extract from skeletal remains or bone and tooth remains from burials, and I look at genetic variation in modern populations. So we have a major project going on right now at the site of Waraabar, which is one of New Zealand's most important archaeological sites, and a site where at least 42 individuals were buried about 730 years ago. And then we've had the opportunity and working with Rangatane, the local descent community that live here, to find out, to do the DNA analysis with them and be able to compare the DNA that we've taken from people living today, which we can just take from a quick cheek swab, to compare that DNA to the DNA of their tupuna, of their ancestors from the site of Waraabar. We can see there are certain diseases that we see today affect Maori and Pacific people at much higher frequency than Europeans, for example, and we want to understand, was that genetic predisposition, or are they carrying genetic markers that may be linked to those diseases in the original populations that came here, or were these changes the result of adapting to a different diet, a Western lifestyle, those kinds of things that often are associated with the diseases? In suffering from something like gout, perhaps they didn't die from malaria, so there may have been an advantage, we think that there may have been some selective advantage for some of these diseases that we would define as diseases today that actually allowed people to survive in the past. So that has a very different kind of an impact on people as opposed to you're just eating the wrong foods and not exercising enough. So there's a link to the past, there's a link to this actually perhaps having been something that was advantageous in the past, but given modern environmental conditions is no longer advantageous and we consider it to be a disease.