In this new effort, the team in France took a new approach—looking at their red blood antigens to find out if they may have had differences from modern humans that left them vulnerable to ...

Humans' blood groups are characterized by proteins and sugars — called antigens — found on the surface of red blood cells. Many people are familiar with the ABO blood typing system ...

It is world's most rare blood type, known as the golden or Rh-null blood type. Rh antigens in the red blood cells is what causes blood to appear as red, however, people with Rh-null blood lack ...