Although studying creativity is considered a legitimate scientific discipline nowadays, it is still a very young one. In the early 1970s, a psychologist named J. P. Guilford was one of the first academic researchers who dared to conduct a study of creativity. One of Guilford’s most famous studies was the nine-dot puzzle, presented with its solution here. He challenged research subjects to connect all nine dots using just four straight lines without lifting their pencils from the page. Today many people are familiar with this puzzle and its solution. In the 1970s, however, very few were even aware of its existence, even though it had been around for almost a century.