#2528 - Cassie Coppersmith
Tuesday, 21 July 2026 · 4 min read · Listen to the episode ↗
In episode 2528, Cassie Coppersmith joins Joe Rogan to challenge conventional timelines for some of the ancient world's most debated structures. She argues that jade artifacts from the Liangzhu culture dated to roughly 3400 BC display drilling precision incompatible with string-and-abrasive tools, and that Angkor Wat contains at least three distinct structural layers, with the oldest potentially dating to 11,000 years ago or earlier.
Cassie Coppersmith argues that jade artifacts from the Liangzhu culture, dated to approximately 3400 BC, display precision inconsistent with the string-and-abrasive tools archaeologists attribute to their creation. A 1930s experiment took a week just to cut through a basketball-sized piece of jade using that method, while drill marks inside actual bi disc artifacts are extremely tight and uniform, unlike marks produced in bamboo-and-abrasive experiments. She acknowledges she has not visited the Liangzhu site and has not seen deep scientific studies measuring the precision tolerances of these artifacts. Her own theory is that the Liangzhu culture found or was gifted the artifacts rather than producing them, drawing a parallel to hard stone vases found in Egyptian graves and to pharaohs including Ramesses II placing their cartouche on objects they did not create.
The Hoysala temples in southern India contain lathe-turned pillars made primarily of chloritic schist, which softens during quarrying and hardens afterward, with some lathe-turned pillars at other southern Indian sites made of granite. Archaeologists concede the pillars are lathe-turned but attribute the process to human or animal power. Coppersmith describes the core of most ancient Indian temples as the original megalithic portion, featuring precise dark stone pillars moved into newer temples with crude stonework above and below them. Indian temples are conventionally dated to 1200 to 1500 AD based primarily on inscriptional evidence, but she argues kings in Cambodian inscriptions rarely claim to have built temples, instead saying they installed a lingam or brought a statue, meaning archaeologists are attributing construction to rulers who never made that claim.
Coppersmith argues Angkor Wat and surrounding Cambodian sites are far older than the officially accepted dates of 900 AD to 1300 AD, potentially placing the oldest construction at 11,000 to 12,000 years ago or earlier. She describes three distinct structural layers at Angkor Wat, with the innermost core appearing extremely ancient and featuring five central towers that look almost melted. The two barays flanking Angkor Wat each measure eight kilometers long and two kilometers wide, and excavating the western baray alone required moving the equivalent of 138 million cubic meters of dirt, comparable to 53 Giza-size pyramids of material. She considers the rice farming explanation for their purpose insufficient given the scale and is developing a theory that the barays, spiral embankments, and other features relate to an integrated water management infrastructure. A 2012 Lidar survey revealed hidden mound fields, spiral earthen embankments, and entire unknown cities beneath the jungle canopy, with most Lidar imagery locked away and not publicly accessible. Stone structures cannot be directly carbon dated, so researchers date wood doorways and brick repairs instead, and brick construction at Cambodian sites sits on top of stone construction, directly contradicting the official narrative that stone building came after brick.
Elongated skulls found in Peru differ from normal human skulls in multiple measurable ways, including the absence of a sagittal suture, a different foramen magnum position, larger cranial capacity than head boarding can explain, and eye socket size and placement inconsistent with artificial skull reshaping. Most hair found on elongated skulls is red. If proportionate to a full body, the individuals would have stood seven to eight feet tall. Coppersmith has personally seen elongated skulls in four different countries and references researcher Maria Whitley as having written about anomalous elongated skulls found across England, where she suggests they may have contributed to fairy mythology.
The Bahubali statue at Shravanabelagola stands roughly 60 feet tall, weighs approximately one thousand tons, is carved from white granite, and sits atop a mountain approximately 650 feet high visible from 50 miles away. Coppersmith notes the statue appears nearly perfectly symmetrical and that the inscriptions at its base are crude and unsophisticated relative to the precision of the statue itself, a pattern she also identifies at Cambodian sites where the earliest kings claimed the most sophisticated ancient structures to legitimize political power.
Filippo Biondi used subsurface scanning technology, validated by accurately measuring a particle collider 1.2 kilometers into a mountain, to announce the discovery of a suspected second sphinx at Giza on the west side of the plateau. AI tools including Grok and Google Gemini returned higher than 80 percent probability in almost every instance that the scan data shows a sphinx under the sand. Archaeologists publicly stated the claims are false without conducting any digging to verify. Rogan noted that Robert Schoch identified water erosion on the exterior of the Sphinx temple that independent geologists confirmed before learning its source, then distanced themselves from the conclusion fearing career damage, and that the erosion indicates the Sphinx is at least 9,000 years old.
Rogan stated that 65 percent of all North American megafauna went extinct following the Younger Dryas impact, with evidence including iridium layers, micro diamonds, and black mat deposits in geological core samples, and two major impact events theorized at approximately 11,800 and 10,000 years ago. Coppersmith argues that conventional archaeologists attack alternative researchers to protect gatekeeping of expertise, that dating stone structures is nearly impossible to do with certainty, and that the researcher who challenged the Clovis first model was professionally destroyed by peers before being proven correct by over 10,000 years. She predicts AI applied to compiled Lidar scans globally could identify previously unknown ancient structures and that extraordinary discoveries in the next ten years will make it very hard to argue against reexamining human history.
This summary was generated from the episode transcript and can contain mistakes.