Why does anything exist at all?

I’ve been thinking about a pretty fundamental question lately: why does anything exist in the first place?

I understand this leans more into philosophy than science, but I’m curious how people here think about it. Where does the universe itself come from? Why is there “something” instead of nothing? And what does it even mean for space itself to exist? It has to come from something at least.

Every time I think about this, I get this weird mental “itch.” I just can’t wrap my head around how any of this came to be, or why there is anything at all.

I’d be really interested to hear both scientific and philosophical perspectives.