In January 2002, while a junior in high school, Gallivan demonstrated that a single piece of toilet paper, 4000 ft (1200 m) in length, can be folded in half twelve times. This was contrary to the popular conception that the number of times any piece of paper could only be folded in half was limited to eight times. She also folded a single square sheet of gold foil in half twelve times. Not only did she provide the empirical proof, but she also derived an equation that yielded the width of paper needed in order to fold a piece of paper of thickness any number of times.
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