Why this Auxiliary verb at the end with conjunction?

Question

I was wondering why helping verb “hat” is at the end here:

“Ich weiß, dass Kolumbus Amerika entdeckt hat.”

Isn’t it supposed to be

“Ich weiß, dass Kolumbus hat Amerika entdeckt” ?

Thanks

Answer 1

In German word order, the conjugated verb takes the second position in main clauses, but the last position in subordinate clauses. The part starting with "dass" is a subordinate clause.