In 2017, astronomers discovered something they had never seen before: an object from another star system passing through our own.

It was named ‘Oumuamua.

At first, it seemed like an unusual asteroid. But then things became stranger. Its brightness changed dramatically, it appeared to tumble through space, it showed no obvious comet tail, and scientists discovered that something was giving it a small extra push as it moved away from the Sun.

Most researchers believe ‘Oumuamua was a natural object. But Harvard astrophysicist Avi Loeb raised a much more controversial possibility: could it have been artificial technology, perhaps something similar to a light sail?

In this episode, we explore the full ‘Oumuamua mystery — from its discovery and strange behavior to the alien technology hypothesis, the scientific criticism, and the natural explanations that followed.

So what really passed through our Solar System?

A strange object from another world… or something built by one?

Why did the Moon ring like a giant bell?

During NASA’s Apollo missions, astronauts deliberately crashed spacecraft components into the lunar surface while seismometers listened to the resulting vibrations. What scientists recorded helped reveal something remarkable about the Moon’s interior — and eventually inspired one of the strangest ideas in modern alternative history:

What if the Moon is hollow?

In this episode of Lost Civilizations: Ancient Aliens & Forgotten History, René explores the story behind the Apollo seismic experiments, the famous descriptions of the Moon “ringing like a bell,” and the theories that grew from them.

Could unusual lunar vibrations simply be the result of the Moon’s dry, fractured geology? Or is there something about our closest celestial neighbor that we still don’t fully understand?

We explore the Apollo experiments, moonquakes, lunar geology, the origins of the Hollow Moon theory, claims that the Moon could be artificial, and the arguments both for and against these extraordinary interpretations.

The goal isn’t to tell you what to believe.

It’s to separate what we know, what we think we know, and what remains unexplained — and let you decide where the evidence leads.

🎙️ Lost Civilizations: Ancient Aliens & Forgotten History

Subscribe for more investigations into ancient civilizations, alternative history, ancient aliens, unexplained archaeology, forgotten knowledge, UFOs, historical mysteries, and the strange corners of our past.

In 1977, a radio telescope in Ohio detected a signal from deep space so unusual that astronomer Jerry Ehman circled the data in red ink and wrote one word beside it: WOW!

The signal lasted just 72 seconds. It was extraordinarily strong, narrowband, and appeared near the hydrogen line—a frequency scientists had suggested an intelligent civilization might use to contact us. But the signal was never detected again.

For nearly 50 years, the Wow! Signal has remained one of astronomy’s greatest mysteries. Was it an unknown natural phenomenon, interference, or possibly a transmission from another civilization?

Now, researchers have reanalyzed the original data and proposed a new explanation involving cold hydrogen clouds and an extremely rare cosmic event, potentially triggered by a magnetar.

But the hypothesis is controversial, and other scientists argue that the physics behind it has never been observed.

So what really happened during those 72 seconds in 1977?