north korea is only 50 miles away from seoul, thae yong—ho's new home.from one of the most repressive places on this planet to one of the most vibrant. but defectors here fear retribution from the north. surrounded by guards, he goes now to help south korea bring down kim jong—un. north korea has called him "human scum". steven evans, bbc news, south korea. if you suffer regular aches and pains in yourjoints, scientists think they may have found out why, and the answer goes back millions of years. they say it's all to do with the way our skeletons have evolved. smeetha mundasad reports. 3—d printing the bones of our distant ancestors and imagining how we might look in thousands of years‘ time. an unconventional way to approach an everyday problem. why is it that the humans of today get so muchjoint pain? to answer, scientists looked back at hundreds of ancient skeletons and say evolution could be partly to blame. this is a 30,000—year—old thigh bone and it is this area here which has changed. we call it the neck of the thigh—bone. as we have gone through