They didn't " Just pop up" you dolt. We're a one in a millions of billions of stars that can support life. How do you think we created computers? We even made artificial life in labs. as Inv3rted said, go to school.
Don't start this dolt/idiot crap. We all have, at least, a high school education here.
I fail to believe that from space dust, bacteria was made. That is where the buck stops for me.
From a big bang, things moshed around until planets of variable type were made, and a Earth type thing was made, but how did bacteria evolve from elements and compounds?
We have, as of yet, been unable to create bacteria from pure elements and compounds without bacteria already there.