It must not be thought, however, that the Combe Capelle race never reached these isles. Whether the culture of Solutré did so or not seems uncertain, but some of the skeletons which have been found here have been classed with the Combe Capelle group.[50] But, as we have seen, this race was present in France, at any rate in some parts of that country, for some little time before the arrival of the men with the culture of Solutré. The colder climate of the Magdalenian period has been shown to coincide with the Bühl advance of the Alpine glaciers,[51] which reached its maximum about 7,500 to 7,000 /B.C./ After that the climate slowly improved, though the precipitation increased, and forests sprang up on the hitherto open lands. As the tundra conditions in Celtic lands gave way to forest, the reindeer migrated to the north and north-east, while their place was taken by the red deer. As the forests developed it became increasingly difficult for men to traverse great distances or to intermingle as freely as they had done before. There was a tendency for separate groups to develop in different regions; so that, when we arrive at the next period, the Azilian, we find very different types of people in various parts of Europe. Even before the close of the Magdalenian period a fresh type had arrived, apparently from the north, if we may judge from the skeleton found at Chancelade in the Dordogne. This skeleton bears a close resemblance to those of the modern Eskimos,[52] and since the latter have retained a type of art reminiscent of certain phases of Magdalenian culture,[53] we may suspect that Chancelade men, following the departing reindeer, passed north-eastward to the tundra of Siberia. It was between 7,000 and 6,500 /B.C./ that a fresh wave of Capsian people from North Africa began to invade Spain,[54] into which peninsula they introduced what is known as East Spanish Art.[55] By degrees they pressed the Magdalenian Cromagnons to the Pyrenees, where their culture declined to that which we know as Azilian.[56] The invaders passed on through Celtic lands, bringing with them a new culture, known as Tardenoisian,[57] and seem to have reached the British Isles before 5000 /B.C./