A team of scientists now believe that a rare form of cosmic ray is coming from far away galaxies 326million light-years away.
Experts had not seen anything like fast radio bursts (FRBs) before 2001 and some speculate they may be signals sent from life on other planets.
Since then, they have found dozens of radio bursts, but they still do not know what causes these rapid and powerful bursts of radio emission.
If the mysterious phenomena is a sign of life in the universe, the latest findings could suggest they is far more widespread than previously thought.
Harvard University researchers believe that these signals might be being sent every day.

vCard.red is a free platform for creating a mobile-friendly digital business cards. You can easily create a vCard and generate a QR code for it, allowing others to scan and save your contact details instantly.
The platform allows you to display contact information, social media links, services, and products all in one shareable link. Optional features include appointment scheduling, WhatsApp-based storefronts, media galleries, and custom design options.
Scientists who studied ten years of readings from Pierre Auger Observatory, the largest telescope of its kind, now believe they can trace the signal’s path.
If the mysterious phenomena is indeed a sign of intelligent life, the latest findings suggest it is far more widespread than previously thought.
Harvard University researchers believe that these signals might be being sent every day.
Their work indicates that at least one FRB is going off somewhere every second.
Extragalactic regions with massive “starburst galaxies” which are producing vast numbers of new stars may be to blame.
Scientists who studied ten years of readings from Pierre Auger Observatory, the largest telescope of its kind, now believe they can trace the signal’s path.
If the mysterious phenomena is indeed a sign of intelligent life, the latest findings suggest it is far more widespread than previously thought.
The discovery came after alien hunters from Stephen Hawking’s Breakthrough Listen project picked up mystery signals which may have been produced by “extraterrestrial civilisations”.
Professor Karl-Heinz Kampert, the spokesperson for the Auger Collaboration, which involves over 400 scientists from 18 countries, said: “We are now considerably closer to solving the mystery of where and how these extraordinary particles are created, a question of great interest to astrophysicists.
“Our observation provides compelling evidence that the sites of acceleration are outside the Milky Way.”