LIMA, PERU—Archaeologists have found a 5,000-year-old temple in the right wing of the main pyramid at the site of El Paraiso. The rectangle-shaped temple was made of stone covered with yellow clay that also contained traces of red paint, and it was entered through a narrow passageway. The researchers think priests used its central hearth to communicate with the gods. “The main characteristic of their religion was the use of fire,” said archaeologist Marco Guillen.