Do you know your blood type? Scientists say everyone should in case of a life-threatening event that results in a need for a blood transfusion. But now, they've discovered a new group of blood types ...

A new study reveals an especially rare blood type that was not known until today – and only three people in the world have it. The discovery, which was made almost by accident, took place as part of a ...

There are different blood types: A, B, AB, and O, with each also being Rh-positive or Rh-negative. Knowing your blood type is ...

More than 100 years ago, Dr. Karl Landsteiner discovered that not all red blood cells are alike. He found that, when different people's blood was mixed, it would often clump up and curdle, destroying ...

We will explore the different blood types, how they are compatible with each other, and why both donors and recipients need to know their blood type. With a focus on educating the public about the ...

(Douglas Sacha/Getty Images) You might not think your blood type has much to do with your health, but research suggests that ...