The space is full of mysteries, some still waiting to be discovered and others that are present, but only a little, leaving us an exciting enigma. That is the case of radio explosions or FRB (Fast Radio Burst).
FRBs are studied by radio astronomy. This is an astrophysical phenomenon that presents radio impulses that barely last a few milliseconds. These waves that came from space were discovered in 2007 by Duncan Dorimer, and from that moment they intrigued the scientific community, because it is not known what causes them.
One of these manifestations, the FRB 121102, was detected in 2012 and is a very special case, because it is the only explosion of radio waves that has been "let in" multiple times and that comes from the same place.
So far in 2017 the FRB 121102 had remained silent until August 26, when he sent 15 repetitive and high frequency pulses. What caused these waves to return and with such intensity? Experts do not know. But that did not stop the gigantic Green Bank telescope from receiving such signals.
Small telescope, right?
What is believed is that this phenomenon comes from a dwarf galaxy located 3 billion light years away, according to National Geographic. It is speculated that these energy peaks originate in black holes or collisions of neutron stars, that is, what is left after the explosion of a supernova (pure super intense things, then).
Another theory, not widely accepted, is that FRBs come from an alien civilization. Although astronomers are inclined that this mystery is caused by a spatial phenomenon, they do not close to the possibility that other intelligent beings emit these waves. After all, nobody knows what could or should not hide in the corners of the universe.