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 girlfriend and I were getting ready to go to a movie when, right as we were about to leave home, my girlfriend asked me the question all guys dread. She asked, “Does this make my butt 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 mall and buy new outfits with jewelry, shoes, and purses to match.