Friday Whatsit for December 3, 2010
This week’s Friday Whatsit is something we see and touch every day. Some of us take it for granted until something happens to it, and some of us spend a lot of money trying to preserve it. But whatever your feelings about it, it’s always there for you. Plus its kind of cool stuff, from a biological perspective. What is it? You know the drill, guesses in the comments section, answer on Monday!