In April 2013, unknown gunmen carried out a highly coordinated sniper attack on the Metcalf Transmission Substation in California, one of the most critical nodes in the United States power grid. They cut fiber-optic lines, fired more than 120 precision rifle rounds, and disappeared before police arrived.

No group claimed responsibility. No suspects were arrested. The FBI ruled it was not terrorism. Yet experts quietly called it a potential dress rehearsal for a larger infrastructure attack.

Was it domestic extremism? A foreign intelligence operation? A disgruntled insider? Or something never meant to escalate beyond a test?

In this episode of Still Unexplained, we explore one of the most chilling unsolved infrastructure attacks in modern American history and examine the theories that continue to haunt national security officials.

Perfect for listeners interested in unsolved crimes, power grid vulnerabilities, domestic terrorism, national security, and modern conspiracy mysteries.

For decades, Venus was imagined as Earth’s twin. A warm ocean world hidden beneath thick clouds. Some scientists even believed it might support life. Then the data came back, and the illusion collapsed.

In this episode of Still Unexplained, we explore how Venus became one of the most hostile planets in the solar system and why its transformation still raises unsettling questions. What exactly went wrong on a planet so similar to our own? Was Venus always doomed, or did something trigger a catastrophic runaway greenhouse effect? And could Venus be showing us a possible future for Earth?

Percy Fawcett vanished into the Amazon jungle in 1925 while searching for a legendary ancient civilization he called the Lost City of Z. He never returned.

In this episode of Still Unexplained, we follow Fawcett’s final expedition into one of the most unforgiving environments on Earth and examine the clues he left behind. Was Z a real advanced civilization hidden deep in the rainforest, inspired by Indigenous knowledge and early accounts of lost cities? Or did obsession, illness, or hostile encounters seal his fate?

From cryptic letters and conflicting rescue reports to modern discoveries that suggest complex ancient societies once existed in the Amazon, this episode explores how myth, archaeology, and human determination collide in one of exploration’s greatest unsolved mysteries.