The smell itself had a powdery sweet reek that seemed to suggest mold – but I wasn’t sure. It was Monday, and the fresh start of a new work week seemed like a good time to clean out the cabinet. So I steeled myself. As I peered into it’s dark recesses of the break room cupboard, two or three possibilities caught my eye: a nondescript, unmarked tin of something, a box of bran cereal, and a half-eaten loaf of bread. I chose the bread. The plastic bag was neatly twist tied, and the printing on the bag helpfully obscured the contents inside. So I reached up and grabbed it to get a better look. Perhaps this was the source, perhaps not... The inch of bread crust visible through the bag was fairly innocuous. It looked bread-ish enough. Still, I was suspicious. So I opened the bag to see what was inside. To my surprise, it was not green, spotted or otherwise obviously moldy. I was initially concerned that it didn’t look quit...