Many of us are fascinated by narratives regarding the origin and evolution of our species. Who are we? How did we people the world? Answers to these simple questions remain elusive even though researchers have been quite successful in describing past human morphology and culture using evidence from anthropology, archaeology, history, sociology and linguistics. However, when they address human migrations, archaeologists are somewhat restricted to surviving artifactual evidence and limited to descriptions of culture expansions, which may have occurred by the movement of either ideas or people. The advent of genomics, by which one can sequence whole or part of an individual's DNA, provided a powerful means to dig into past human demographic history. Notably, the coalescent theory posits that individuals in a population share genetic variants that originated from a common ancestor. This powerful theory is the basis for a number of bioanalytical innovations that utilize genetic data to reconstruct human movements around the world.

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