Nov 9, 2026 · 3h 2m
Cassie Coppersmith questions the timeline of ancient megastructures
The Basement: Cassie Coppersmith | Ancient Sites That Rewrite Human History
The episode connects a corporate exit and anti-trafficking mission to a provocative investigation of whether ancient sites contain overlooked layers of history.
- 1Cassie Coppersmith traces her shift from finance and mining to anti-trafficking work and ancient-site investigation.
- 2LiDAR, water systems, and unusually precise stonework lead her to question whether later civilizations inherited older infrastructure.
- 3Her claims remain speculative, but she argues that cumulative anomalies and better scanning could reshape archaeological timelines.
Don't miss
Cassie presents Angkor’s LiDAR-mapped earthworks and water network as evidence that the site may preserve infrastructure older than the standard Khmer chronology.
The brief
Cassie Coppersmith describes leaving a successful finance and mining career after her mother’s death, then finding a new direction through solitude, spiritual experiences, and anti-trafficking work.
A megalithic tour with Derek Olson redirected Cassie toward ancient sites, eventually producing Secrets in Stone and a research style built around documenting anomalies before making firm claims.
The central argument concerns Angkor: LiDAR reveals geometric earthworks, reservoirs, canals, and spiral embankments that Cassie believes may reflect an older water-management system later modified by the Khmer.
She extends the question to precise stonework in Cambodia and India, asking whether apparent lathe-turned surfaces point to lost techniques copied by later builders without being fully understood.
The episode’s most revealing tension is between Cassie’s openness to Bigfoot, spiritual energy, and deep antiquity theories and her stated preference for evidence, specialists, and cumulative anomalies.
Her proposed test is straightforward but demanding: broader LiDAR access, multidisciplinary fieldwork, and new scans of sites such as Angkor, Koh Ker, Aksum, and Lalibela.
Books & mentions
Some links are affiliate links — PodLume may earn a commission if you buy.
The Mahabharata
The episode invokes Indian antiquity and epic traditions while discussing monumental sites and possible deep historical layers.
Secrets in Stone
Cassie’s channel is the project through which she documents the ancient sites and anomalies discussed here.
Weekly email
State of the Pod, every Monday
The week's most-discussed names and stories from podcasts, with the moments behind them. Free, five minutes, unsubscribe in one click.