#33 What is your blood type? Japanese people love talking about Blood types. As you know we have four types of blood types such as A, B, O, and AB. Have you ever wondered why O, not C? There is a funny story. Blood types were originally A, B, and C. Later on, a professor found AB. Definition of C type is not to have an antigenic substance of A and B which means 0(zero), but somehow this 0(zero) became O. Isn't it an interesting story? My blood type is ZERO by the way.😎