It wasn't the first time I killed an animal in the name of science. I dissected a fetal pig in a high school biology class. I massacred bacteria by the billions as a student research technician and budding microbiologist. The only twinge of guilt I felt when dissecting worms as a 12-year-old was when my mom served spaghetti with meat sauce for dinner, and the noodles on my plate looked all too similar to the slimy earthworms I had earlier dispatched to Valhalla with a scalpel.