Andronovo horizon (2000–1450 BC) Sintashta-Petrovka-Arkaim (2050–1750 BC) Alakul (2100–1400 BC) Fedorovo (1400–1200 BC) Alekseyevka (1200–1000 BC) Bactria-Margiana Archaeological Complex (2200–1700 BC) Yaz culture (1500–1100 BC) Indian subcontinent Ochre Coloured Pottery culture (2000–1500 BC) Cemetery H culture (1900–1300 BC) Swat culture (1400–800 BC) Painted Gray Ware culture (1200–600 BC) Iranian Plateau Early West Iranian Grey Ware (1500–1000 BC) Late West Iranian Buff Ware (900–700 BC) suggests the following identifications: Language The Indo-European language spoken by the Indo-Iranians in the late 3rd millennium BC was a Satem language still not removed very far from the Proto-Indo-European language, and in turn only removed by a few centuries from Vedic Sanskrit of the Rigveda. The main phonological change separating Proto-Indo-Iranian from Proto–Indo-European is the collapse of the ablauting vowels *e, *o, *a into a single vowel, Proto–Indo-Iranian *a (but see Brugmann's law). Grassmann's law and Bartholomae's law were also complete in Proto-Indo-Iranian, as well as the loss of the labiovelars (kw, etc.) to k, and the Eastern Indo-European (Satem) shift from palatized k' to ć, as in Proto–Indo-European *k'ṃto- > Indo-Iran. *ćata- > Sanskrit śata-, Old Iran. sata "100". Among the sound changes from Proto-Indo-Iranian to Indo-Aryan is the loss of the voiced sibilant *z, among those to Iranian is the de-aspiration of the PIE voiced aspirates. Religion Despite the introduction of later Vedic and Zoroastrian scriptures, Indo-Iranians shared a common inheritance of concepts including the universal force *Hṛta- (Sanskrit rta, Avestan asha), the sacred plant and drink *sawHma- (Sanskrit Soma, Avestan Haoma) and gods of social order such as *mitra- (Sanskrit Mitra, Avestan and Old Persian Mithra, Miθra) and *bʰaga- (Sanskrit Bhaga, Avestan and Old Persian Baga). Proto-Indo-Iranian religion is an archaic offshoot of Indo-European religion. From the various and dispersed Indo-Iranian cultures, a set of common ideas may be reconstructed from which a common, unattested proto-Indo-Iranian source may be deduced. The pre-Islamic religion of the Nuristani people and extant religion of the Kalash people, is mostly based on the original religion of the Indo-Iranians. Michael Witzel theorises that these religions might share some elements with Shinto, one of the national religions of Japan, which according to him may contain some Indo-Iranian influence owing to contact presumably in the steppes of Central Asia at around 2000 BC. In Shinto, traces of these can be seen in the myth of the storm god Susanoo slaying a serpent Yamata-no-Orochi and in the myth of the