Did you know that the history of blood transfusion goes back four centuries? There's a lot that we don't know about blood. January is National Blood Donor Month, a time set aside to raise awareness for the cause of blood donation because typically in January, there are fewer donors after the winter holidays, even though blood is still critically needed. If you want to know about blood, spend some time with the man who literally wrote the book on blood - Professor Douglas Starr. That's what producer John Yeager did recently for this edition of Bloodworks 101.