sentences:  Last Glacial Maximum refugia
  
  Last Glacial Maximum refugia were places where humans, and also other species, survived during the last glacial period in the northern hemisphere, around 25,000 to 20,000 years ago.Sub-Saharan Africa and Australia were not affected by the glaciation (although vast areas of those continents were then too dry for human habitation of any sort, even by the most specialised and well-adapted foragers), and the Americas and New Zealand had no humans at that time.