Christine "George" Jorgensen. In 1952, George Jorgensen became Christine Jorgensen after the world's first sex-change operation in Denmark.

Interferon. There are two different types of Interferon.

40 Percent. Going gray before 20 in Caucasians, or before 30 in African-Americans is considered premature graying.

Flying. The fear of flying gets more attention than most phobias because air travel is difficult to avoid.