A man drives home on a cold November night in 1966, and the road in front of him stops feeling like the world he knows. Along Interstate 77 near Parkersburg, West Virginia, Woodrow Derenberger reports a craft close enough to halt traffic and a stranger with a fixed smile who “speaks” without moving his mouth. Minutes later it’s gone, but the details stick, especially that smile.

Ten days after, downriver near Point Pleasant and the abandoned TNT area, another report lands in the dark: something tall, winged, and watching, the sightings that will become the Mothman story. We trace how these encounters sit inside a larger Mid-Ohio Valley pattern, where UFO sightings cluster low to the ground along the Ohio River corridor and repeat across decades with the same shapes, the same movements, and the same silence. When investigators call a place like this a “window area,” they’re talking about persistence, not headlines.

Then we layer in the part we can measure. Chemical plants, power generation, industrial runoff, and forever chemicals like PFAS and PFOS have shaped this region for generations, with real consequences that show up in court records and health research tied to the C-8 class action lawsuit. We also walk through practical tools for documenting sightings, from writing down time and direction to searching the National UFO Reporting Center, and we dig into the FBI Vault under the Freedom of Information Act to see how “unidentified” gets filed, transferred, and often left unresolved.

If you’re drawn to true crime science, environmental contamination, Appalachian history, and high strangeness, come with us down the river. Subscribe, share the episode with a friend who loves mysteries, and leave a rating or review so more listeners can find Killer Chemistry.

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