Do Animals have Blood Groups?

06 October 2008
Presented by Diana O'Carroll.

Why do we have different blood groups, such as A, B, O and rhesus positive or negative?& Do animals have blood groups?& If so, are they the same as humans, or do they have their own?& We find out in this Question of the Week.& Plus, we ask why songs sound better the more you hear them...

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