KnoWhy #174 - When Did Cement Become Common in Ancient America? (Helaman 3:7)

In the first century BC, some Nephites went up into the land northward and began building cities of cement. In the 19th century, some people were aware of pre-Columbian cement construction, yet as late as the 1970s scholars still did not know much about its origins and development. Now, the development from whitewash and plaster to structural cement flourishing ca. 100 BC is better documented, and matches the Book of Mormon picture. Despite knowledge of pre-Columbian cement in 19th century, some have still doubted the Book of Mormon's report of ancient American cement. This concrete evidence illustrates that sometimes even well-educated critics are simply wrong.