In 1941, Reiche first saw the Nazca Lines with American historian Paul Kosok, launching her lifelong dedication to studying and preserving them.
In 1941, Maria Reiche first encountered the vast network of geoglyphs etched into the desert plain near Nazca, Peru, in the company of American historian and geographer Paul Kosok. Kosok, who had been investigating ancient irrigation systems in Peru, had begun to study the strange lines and figures visible on the ground and enlisted Reiche's mathematical expertise to help interpret them.
This meeting proved to be the pivotal turning point of Reiche's life. Where Kosok saw a possible calendrical or astronomical purpose to some of the lines, Reiche brought a mathematician's precision to bear, meticulously measuring, sketching, and cataloguing the enormous figures of animals, plants, and geometric shapes that stretch across dozens of square kilometers of the Peruvian desert. She would go on to spend more than fifty years of her life, largely alone and often self-funded, walking, measuring, and sweeping away debris from the lines by hand.
Historically, this 1941 encounter marks the beginning of what became the first sustained, systematic scientific study of the Nazca Lines. Reiche's efforts transformed the geoglyphs from a local curiosity into a subject of international archaeological and astronomical interest, and her advocacy proved essential in convincing Peruvian authorities to protect the site, which today is a UNESCO World Heritage Site. Without this singular introduction, the Nazca Lines might never have received the scholarly attention or the protective status they enjoy today.