In 1881, doctor William Halsted rushed to help his sister Minnie, who was hemorrhaging after childbirth. He quickly inserted a needle into his arm, withdrew his own blood, and transferred it to her. After a few uncertain minutes, she began to recover. What made this blood transfusion successful? Bill Schutt explains the history of the life-savin...

15th century Europeans believed they had hit upon a miracle cure: a remedy for epilepsy, hemorrhage, bruising, nausea and virtually any other medical ailment. It was a brown powder known as "mumia," and was made by grinding up mummified human flesh. But just how common is human cannibalism, and how do cultures partake in it? Bill Schutt explores...