EDIT: Let’s cool it with the downvotes, dudes. We’re not out to cut funding to your black hole detection chamber or revoke the degrees of chiropractors just because a couple of us don’t believe in it, okay? Chill out, participate with the prompt and continue with having a nice day. I’m sure almost everybody has something to add.
That’s literally what dark energy and dark matter are though, place holder names for phenomena we don’t fully understand yet. I’m not sure how you weren’t aware of that.