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 ...

Researchers have recreated a miniature human bone marrow system that mirrors the real structure found inside our bones. The model includes the full mix of cells and signals needed for blood production ...

Blood does more than move oxygen and fight infection. It also carries a record of where animals came from. A new evolutionary analysis suggests that the roots of blood cells stretch back roughly 700 ...