Neanderthal occupation of Britain was limited and by 30,000 BC the first signs of modern human (Homo sapiens) activity. The most famous example from this period is the burial of the Red Lady of Paviland in modern-day Wales. A final ice age covered Britain between around 70,000 and 10,000 years ago with an extreme cold snap between 22,000 and 13,000 years ago which may have driven humans south out of Britain altogether. The environment during this ice age period would have been a largely treeless tundra, eventually replaced by a warmer climate, perhaps reaching 17 degrees Celsius (62.6 Fahrenheit) in summer which encouraged the expansion of birch trees as well as shrub and grasses.