Labcoat Chop
Here's me back in August, 2002. I look pretty much the same now, but I have a goatee. Notice the receding hairline as result of college chemistry and calc.
Red hair
Here's me ~2.5 years ago. I was just a lad of 18.75.
Strolling Mark
Here is a more current picture of me. I'm strolling through Des Moines with my headphones in this one.