“Milky Way’s Sweet Spot” –Earth at Center of Galactic Habitable Zone
If advanced, space-faring alien life exists anywhere in the Milky Way, odds are they will live in the Galactic Habitable Zone (GHZ). And if they want to explore the Milky Way searching for other life-bearing planets, similar to Earth, they would only have to explore the GHZ, not the whole of the Galaxy.