More than 3,000 years ago, in what is now Kazakhstan, six dogs were laid carefully in the ground. Were they beloved pets? Sacrifices, since they seem to have ritually arranged? No one can say for sure. But for scientists studying how dogs threaded themselves into human history, archaeological finds like these are precious. They provide a chance to peek into the DNA of dogs, to see just how they leapt from one group of humans to another, making their own migrations across continents. Advances in

Tag-uri: DNA