The first detailed study of the drawings was initiated by the German astronomer and archaeologist Dr. Maria Reiche. She discovered that the lines, some of which run for up to five miles, have an average error of no more than 9 minutes of arc, a deviation of only 4.5 yards per mile. The same figure that is the limit of accuracy which can be obtained by modern photogram-metric survey techniques. One drawing represents a thin-limbed monkey, recently identified as the Spider Monkey from the Amazon jungle, while a remnant of Nazca pottery has a distinct picture of a Penguin indigenous to either Antarctica or possibly the Galapagos islands. Another piece of pottery found has the faces of five girls on it – one white, one red, one black, one brown and one yellow. (9).