Haplogroup M is a major lineage in human mitochondrial DNA, which is passed down from mothers to their children. It is primarily found in populations across Asia, Oceania, and parts of Africa. This haplogroup is believed to have originated around 60,000 years ago and is associated with the early migrations of modern humans. Within haplogroup M, there are several subclades, each representing different branches of ancestry. These subclades help researchers trace the movement and genetic diversity of ancient populations. Studies of haplogroup M contribute to our understanding of human evolution and the peopling of various regions around the world.