Hahaha, just saw you earlier Bleach reaction and wanted to tip Ichigo vs. Byakuya... glad I checked your playlist first. Enjoying your reactions. Fun facts: Ichigo means "strawberry" in Japanese and he has red hair. Ichi is also 1 and Go is 5.... he is 15 at the beginning of the story. The Bleach song list and OST are still one of my favorites till today. I started watching/reading Bleach since it first came out.
How big the Universe may be, the Creator of it all (God) is bigger than His creation. In what is the Universe expanding? Before the Big Bang there must have been space for the Universe to inflate in.
Him disintegrating was a combination of how much power he had already used, not being able to undo damage to his organs and that he's a soul. No power plus wrecked body meant he just couldn't hold his form anymore and he fell apart.
Yes, life probably exists somewhere in the Universe, and perhaps even human-like and in many places, too. However, quite a different thing would be that we might ever get in touch it. The technology needed to cover the immense distances involved, as well as the necessity to coincide time-wise, make it extremely unlikely it will ever happen. The Universe is about 14 billion years old (rounding up) so even assuming our civilization lasts about 70 thousand years (and that's a big assumption since it's only around 10K old and we're constantly threatening each other with total nuclear annihilations) the chances that other civilization capable of space/galactic travel coexists at the same time with ours is only about 0.00053%.