It's good to remember that the denisova cave is probably an extreme example of sampling bias. Because ancient DNA survived in it's environment, it was possible

It's good to remember that the denisova cave is probably an extreme example of sampling bias. Because ancient DNA survived in it's environment, it was possible to make these historical reconstructions. In all likelihood, it was not a great place to live. People would have been on the temperate and tropical coastal regions all around the continents.