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.

Ulnar Nerve. Striking the ulnar nerve at the elbow where it is unprotected by muscle or bone causes the "funny bone" tingling.