Talk about random:
Some rock floating through space for billions of years just happens to line up with our orbital trajectory and bam!!
Also, we all have 16 great-grand parents, all who lived roughly about the same time, but perhaps scattered all over the planet. Not knowing each other, but they all in rather random ways had sex and produced your grand parents and so on, and here you are. So many random events wrapped up in that going back to the beginning of time.
If you are reading this, or if you are not, your existence is incredibly random