I have discovered the answer to a question that has been puzzling scientists for hundreds of years. What is the exact difference between a split second and a nanosecond? My other half and I were getting ready to go to a movie when, right as we were about to leave home, she asked me the question all blokes dread: “Does this make my bum look big?” If I had said “no” in a nanosecond, we’d have been out the door. Since I took a split second, she had to go to the shops and buy new outfits with jewellery, shoes, and purses to match.