This video from NOVA: "Iceman Murder Mystery" describes the process of testing the DNA of a mummy called Ötzi who died over 5,000 years ago in the European Alps. Getting DNA samples from human remains that are this old is very difficult; however, when DNA can be tested, it can give us very detailed information on how humans lived, what they ate, what illnesses they suffered, and, as seen in the video, even whether they were lactose intolerant.
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