Final answer:
The statement that ancient monumental achievements required alien technology is false. Archaeological and historical evidence proves they were built using human ingenuity and engineering skills.
Step-by-step explanation:
The claim that ancient cultures constructed monumental achievements like pyramids and obelisks with the help of alien technology is false. Archaeological evidence and historical records clearly indicate that these structures were the result of human ingenuity and engineering skills. Ancient civilizations, such as those in Egypt and Mesopotamia, had the necessary organization, manpower, and materials close to construction sites, which enabled them to accomplish these feats. The engineering marvels like the Great Pyramid at Giza were built without modern technology, showing the sophistication and capability of ancient engineers and workers.
The notion that such structures required extraterrestrial assistance underestimates the complexity and resourcefulness of ancient societies. Researchers have studied these ancient pyramids extensively, revealing the high level of craftsmanship and understanding of geometry and physics possessed by these early engineers, which allowed them to construct these massive structures that have stood the test of time.