It’s eight o’clock on Friday night and I’m cell-sitting. As primary cell-caretaker, my job is to stress out the poor cells. This past summer, I studied the effects of microgravity on astronauts’ bone density when traveling to outer space. My job was to dissect the molecular mechanisms behind this bone degeneration. I applied mechanical stress to bone cells via a stretch device, mimicking the forces that running or jumping applies on bones in our bodies. I expected...