1. The ancient pyramids of Egypt have stood for thousands of years, capturing the imaginations of historians and tourists alike. Their
construction remains a mystery, with theories ranging from alien involvement to complex human engineering. Despite the passing of
millennia, the pyramids continue to withstand harsh weather conditions and the test of time. Many of the pyramids were originally
covered in smooth white limestone, making them shine brightly in the sun. Today, only the foundations remain visible, with the outer
layers worn away. The pyramids were built as tombs for the pharaohs, symbolizing their power and ensuring their journey into the
afterlife. Modern technology, such as satellite imaging, has provided new insights into their structure and layout.
According to the passage, what can be inferred about the pyramids?