A groundbreaking international study has revealed that early Asians undertook humanity s longest known prehistoric migration walking more than 20,000 kilometers over thousands of years from North Asia to the tip of South America. By analyzing the genomes of over 1,500 people across 139 ethnic groups, researchers mapped ancient routes and genetic divergences, uncovering how these early humans adapted to vastly different environments and left behind genetic footprints that still shape populations today.