Between the Andes Mountains, the dense jungles of the Amazon, and the vast deserts of North America, flows an enigma that connects indigenous peoples: type O blood. This blood type, devoid of A and B antigens, is not only humanity’s oldest, but in the Americas it appears to be an almost universal common legacy, a biological echo of an ancient past.
In the 1980s, scientists were surprised to discover that 99% of the Navajo people of Arizona shared this blood type. Years later, in the high mountains of the Peruvian Andes, something even more shocking was documented: 100% of the Quechua community possessed type O blood! Similar stories are replicated in the Brazilian jungles, where 92% of the Yanomami share this trait, and in the indigenous communities of Oaxaca, Mexico, where it reaches an astonishing 98%.
What mystery lies behind this genetic uniformity? Is it the imprint of a mother civilization or an ancient adaptation to the environment? Type O blood is more than a trait; it’s a living symbol of identity, a code that tells a story of resilience, unity, and connection through the centuries.
An enigma that continues to captivate both science and the collective imagination.
