We can now track the spread of humanity by following a trail of blood…types.
A group of researchers did just that, by analyzing genetic information from three groups of Early Man — most recently Neanderthal and Homo sapiens (earlier work also included Denisovans, an extinct subspecies that roamed Asia until about 30,000 years ago).
Although their analysis, which appears in Scientific Reports, stretches back about 120,000 years ago, it also offers some implications for current medicine and health. Different blood types confer different immune responses.
