In a medical text I came across the following sentence:
Morphine and morphine-like drugs are the strongest painkillers there are.
I have never seen the usage of "there are" at the end of the sentence. So it sounded different and I can't make sure if it is all right to use it that way.
So, my questions are:
Is it correct to put "there are" at the end of the sentence like that?
Instead of a "...there are." structure at the end of the sentence, can I use "...out there."