Wow there Might be Billions of "Alien-Earths" in Our Galaxy

It would be interesting to know what level of technology (or lack thereof) for the various races that live on these "alien-earths?" Also it would be cool to find out how many of them are sending out radio waves.

Taking this into account, about 6 percent of red dwarfs in the Milky Way galaxy should host Earth-like planets, the astronomers said.

Since about 75 percent of the galaxy's 100 billion stars are red dwarfs, this translates to an estimated 4.5 billion "alien Earths" spread throughout the galaxy. The research team stressed, however, that this is a tentative figure because the distribution of stars varies widely.

The chance of life only being on our planet out of these potential 4.5 billion planets is just ludicrous.