Human blood types have deep evolutionary roots ScienceNews: A new analysis suggests that the A, B and O blood types in people evolved at least 20 million years ago in a common ancestor of humans and ...

In a groundbreaking development, French scientists have identified the world’s rarest blood group, known as Gwada-negative. It's a blood group so rare that only one woman in the world is known to have ...

Human blood already comes in a bewildering variety of types, but researchers have now identified a new one so rare that only three people on the planet are known to carry it. The finding exposes just ...