7 years ago, specifically in 2019, gravitational wave detectors on Earth Ligo and Virgo recorded a signal – a sudden explosion, less than one -tenth of a second – which had not come from a collision and merger of black holes.

The strange signal was named GW190521 but to date its origin has not been identified.

Now, a new study reveals that the GW190521could come from a parallel universe.

Scientists at the University of Chinese Academy of Sciences even argue that the signal may have been an “echo” from the collapse of a worm.

The GW190521 was less than 10mm of a second and did not have the normal rising signal associated with two black holes, moving spirally to each other

Gravitational waves are ripples in the tissue of space and time, which are usually created when huge, dense objects, such as black holes.

According to the Daily Mail, if a conflict of two black holes were strong enough to create a tunnel between universethe gravitational wave could pass through the “neck” of the worm and reach our own universe.

Since such a wormhole would remain open for a short time, this would explain why the GW190521 signal was so short and was cut off sharply.

Dr. Chi Lai, the leader of the research, said – although their models show that this scenario is not particularly likely – however, “we cannot exclude that the signal traveled to Earth from another universe” through a worm.