In my limited knowledge, the evidence for this seems to be rivers/places mentioned in Rigveda are around Saraswati river and IVC. But what is the evidence for the ones that say that Rigveda came from outside and Aryans came from outside? As I understand it, they show linguistics and say that Sanskrit is a branch of Indo-European languages. What I don't understand is how does that prove that AIT/AMT happened?
Sanskrit is indeed a branch of Indo-Zooropean languages....but that doesn't prove AIT/AMT....
So, the accepted thing across the globe is that in Pre-historic times, there was a language called Proto-Indo-European language simply called as PIE & all the Indo-European languages are its descendants.....
but the question here is what is the homeland of the PIE language, AIT @$$holes claim that steppe is the PIE homeland & we ,the OIT guys claim it is India i.e all the Indo-European languages had their origin in India....so which one is true, AIT or OIT??
The answer lies is Sarasvati river, Rigveda, Avesta & mittani ,not genetics, genetics comes last in the hierarchy of evidences....
AITjeets claim that OG Saraswati river is in Afghanistan & Sarasvati river of India is 2nd river & hence it proves AIT...but it is wrong.... Rigveda clearly mentions that Sarasvati flows to sea,& thus Indian Saraswati is the Original Saraswati & since this river has dried up by 1900BCE...it makes Rigveda contemporary to IVC....there by single handedly killing the AIT...
Just like Mlecchas has Profit Momo as their Profit, similarly Zorostrians aka Parsis have a Prophet called Zarathustra....in Avesta it is mentioned that Zarathustra had a debate with a Rishi named Gotama,& this name Gotama found in RV in 1st mandala which is late mandala...thus it makes Avesta contemporary to late RV, which means they lived together untill the composition of RV & RV is entirely composed in India & it means Aryans & Iranians lived together in India & during late period of RV, these Iranians went out of India ...which is nothing but OIT....Out of India Theory