You may not imagine that the origin of human ancestors may also be related to the Milky Way. Scientists speculate that about 3.5 million years ago, Sagittarius A, a supercolossive black hole at the center of the Milky Way, had a massive flare burst and released two huge cone-shaped beams of energy.
This may be a cosmic spectacle that only supermassive black holes can produce. In studying the history of the Magellanic Galaxy, astrophysicists have discovered the Large Magellanic And Magellanic Clouds, which are actually caused by the explosion of the black hole flare at the center of the Milky Way. A huge "ionization cone" penetrated the Magellan Nebula. This nebula, 200,000 light-years away from the Milky Way, preserves direct evidence of the Black Hole Flare of the Milky Way.
After all, it is the "engine" of the Milky Way, and the mass of the Black Hole in Sagittarius A is equivalent to the sum of 4.2 million masses. Hubble tells us that it does have the ability to launch flares into space and swear its existence. It was like a beacon that suddenly flashed in the dark sea and quickly disappeared. Did this event have an impact on Earth? All we know is that 3.5 million years ago, australopithecus, the ancestor of mankind, was living leisurely on the African continent.
The eruption of the Sagittarius A black hole lasted for 300,000 years, but for the universe, it was only a very short period of time. Scientists would rather believe that this is just a small episode in the history of the milky way, just coinciding with the time of human ancestors, which is purely coincidental.
Compared to other galaxies in the universe, the Milky Way is low-key enough to make humans shake their heads. The center of the Milky Way isn't as bright and active as other galaxies, but this time the flare time gives us a new idea of it. For human civilization, we still need a low-key galaxy. What do you think?