More than a century after their discovery, we still don’t know what blood groups like O, A and B are for. Do they really matter? Carl Zimmer investigates. When my parents informed me that my blood ...

The ABO-Rh system of blood group typing is an immensely successful method that helps medical professionals safely perform blood transfusions throughout the world. Scientists from the French Blood ...

There are rare blood types beyond the eight most common ones, and researchers have discovered one more that brings the total count to 49. Blood type A(B) is caused by a four gene mutations and was ...

Scientists in Thailand have identified a remarkably rare hybrid blood type, B(A), found in only three individuals out of hundreds of thousands tested. This discovery challenges traditional blood ...

The team observed the emergence of the three-dimensional embryo-like structures under a microscope in the lab. These started producing blood (seen here in red) after around two weeks of development - ...

Flow chart: Karl Landsteiner discovered blood types in 1900, yet scientists have still not come up with an explanation for their existence (SCIEPRO/Getty) When my parents informed me that my blood ...

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 ...