The Source of Madness in Alice in Wonderland

We all know and love Lewis Carroll's Alice in Wonderland and the audacious characters therein, like the Queen of Hearts and the Mad Hatter. But with the release of the latest film version of the tale comes a discussion on just how the Mad Hatter got his name - even Johnny Depp chimes in on the speculation. Was the name really meant to be the "Mad Adder?" Or did the Hatter's madness have to do with mercury poisoning, a pitfall of the trade in the 19th century? You can read the full article here.