Science and the Legal System
It takes time for the law to understand a scientific principle. We may take finger prints and DNA as cast in iron evidence today, but that takes time. Carl Zimmer talks about one such instance involving the famous actor, Charlie Chaplin, in his book on heredity, She has her Mother’s Laugh . A serial womanizer, Chaplin had an affair with Joan Berry, got bored with her, and dumped her for the next girl. Berry, however, would not go away quietly. In 1943, she filed a paternity suit claiming that her in-the-womb baby was Chaplin’s and demanded he pay for the child’s upbringing. Back then, DNA comparison wasn’t an option, so lawyers tried an inherited trait as a test instead: the blood type. At that time, scientists knew that the blood variant proteins (A, B and O) had certain characteristics: A and B both dominated over O. This implied certain patterns: if you got A from one parent and O from the other, you’d be an A. To be an O, you needed an O from both parents. Conv...