Complex sentence: The Basques have the most ancestral phylogeny in Europe for the mitochondrial haplogroup U8a, a rare subgroup of U8, placing the Basque origin of this lineage in the Upper Palaeolithic.
Split into simpler sentences: The Basques have the most ancestral phylogeny in Europe for the mitochondrial haplogroup U8a. This is a rare subgroup of U8, placing the Basque origin of this lineage in the Upper Palaeolithic.