VIEIRA, Jim

Jim Vieira is an American stonemason, researcher, and author known for his investigations into alleged giant human remains and megalithic stone structures throughout North America. Based in Massachusetts, Vieira has spent over two decades collecting historical newspaper accounts and archaeological reports that he claims document the discovery of unusually large human skeletons across the United States.

Vieira’s research focuses on 19th and early 20th-century newspaper reports describing the discovery of human remains ranging from seven to twelve feet in height, often found in burial mounds or ancient sites. He maintains an extensive database of such accounts and argues that these represent evidence of a lost race of giants that inhabited North America before known Native American cultures. He has also promoted claims that the Smithsonian Institution systematically suppressed evidence of these discoveries.

In addition to his work on giant skeletons, Vieira investigates megalithic stone structures in New England and beyond, arguing that many were built by ancient civilizations rather than colonial farmers or Native Americans. He has appeared on television programs including “Search for the Lost Giants” and has given numerous lectures promoting his theories about ancient advanced civilizations in the Americas.

Mainstream archaeologists and anthropologists have criticized Vieira’s work, noting that many historical newspaper accounts he cites lack scientific documentation, proper measurements, or photographic evidence. The Smithsonian Institution has explicitly denied claims of suppressing giant skeleton evidence, with their historians noting that sensationalized reporting was common in 19th-century newspapers and that alleged giant remains were often misidentified animal bones, burial artifacts, or entirely fabricated stories designed to attract readership.