A group of scientists believes they’ve found evidence of a parallel universe after detecting a mysterious gravitational wave signal. Could this be proof of a wormhole connecting our universe to another?
A groundbreaking theory from scientists at the Chinese Academy of Sciences suggests that a mysterious gravitational wave signal detected in 2019 may have originated from a parallel universe.
Gravitational waves, which are ripples in space-time caused by some of the most powerful and energetic events in the universe, were first detected by the Laser Interferometer Gravitational-Wave Observatory (LIGO). The signal in question, known as GW190521, was initially believed to be the result of two black holes colliding. However, a recent paper raises an entirely different possibility: that the wave came from a wormhole connecting our universe to another.
The Mysterious GW190521 Signal
The gravitational wave signal was first identified by scientists in 2019. While the original hypothesis pointed to the collision of two black holes, researchers from the Chinese Academy of Sciences have suggested that it could instead be the result of an echo from a wormhole remnant in a parallel universe.

In a paper submitted in September 2023 titled “Is GW190521 a gravitational wave echo of wormhole remnant from another universe?”, the researchers argue that the signal’s unique characteristics raise questions about the original theory.
One of the most intriguing aspects of the GW190521 event is its unusually short duration and the absence of the typical inspiral phase, which is generally seen in binary black hole (BBH) collisions. The researchers speculate that this might be a single, isolated gravitational wave echo pulse from a wormhole—essentially the remnants of a black hole merger from another universe, connected to ours through a “throat” of a wormhole.
What Is a Wormhole Throat?
A wormhole’s “throat” refers to the central part of the structure that forms a tunnel, providing a shortcut between two distant points in space and time. The scientists suggest that this connection might have allowed the wave to travel from a different universe, offering a new and fascinating explanation for the origins of the signal.
While the paper acknowledges that the most likely explanation for the gravitational wave is still a binary black hole merger, the researchers argue that the evidence is insufficient to rule out the wormhole theory.

The Multiverse Theory
The idea of a multiverse—multiple, parallel universes—has been explored by many scientists and theorists, including physicist Alexander Vilenkin. Vilenkin suggests that cosmic inflation (the rapid expansion of the universe after the Big Bang) did not stop everywhere at once. According to his theory, inflation is still ongoing in remote parts of the universe, creating “bubbles” of new, self-contained universes.
Vilenkin explains: “In our cosmic neighborhood, inflation ended 13.7 billion years ago, but it still continues in other places, with new regions constantly being formed. These bubbles of new universes keep growing without bound, driven apart by inflation. We live in one of these bubbles and can observe only a small part of it.”
Could the gravitational wave signal detected by LIGO be the first evidence of such a parallel universe? While still speculative, this new theory brings us one step closer to understanding the possibility of multiple universes and the mysterious forces that govern them.