You really ought to check these out:

sumanah writes about the city of New York as a system, as a religion: While Listening To Kraftwerk

annafdd writes about The physics of dishwashing (which, incidentally, also explains why it's important to wash your hands for a full 20 seconds)

dsmoen explains how gay marriage can save lives, in a heartbreaking post about the details of organ donation: How I Got Married and Donated a Liver