In the 1940s, an American explorer named Paul Kosok suggested that the drawings are a chronicle (记录) of the movement of the stars and planets. __________ (48) Later, an astronomer tested his theory with a computer, but he couldnt find any relation between the lines and movements in space.

Another explanation is that the lines may have been made for religious reasons. British researcher

Tony Morrison investigaled the customs of people in the Andes Mountain and learned that they sometimes pray by the side of the road. Its possible that in the past, the lines of Nazca were created for a similar purpose. __________ (49) But the local people have never constructed anything this big.

Recently, two other scientists, David Johnson and Steve Mabee, have speculated that lines could have been related to water. Nazca is one of the driest places in the world and receives only 2cm of rain every year. While Johnson was searching for ancient water sources in the area, he noticed that some waterways built ancient people were connected with the lines. Johnson believes that the Nazca lines are a giant map of the underground water in the area.__________(50)

A. Other scientists are now searching for evidence to prove this.

B. A Swiss writer named Erich Von Daniken wrote that the Nazca lines were designed as a landing place for UFOs.

C. Scholars differ in interpreting the purpose of the designs.

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