Zoroastrianism: Before Judaism, Christianity, And Islam

In the U.S.A. the encounter with the notion of Zoroastrianism, usually, is in  a high school World History class with a quick mention of it as a monotheistic religion. Of course, it is, and was even while Judaism was still monolatristic (acknowledging that there  were other gods but that Yahweh was the chief god worthy of undivided attention and praise). Known as Zarathustra in languages other than English, the chief founder of this Indo-Iranian religion proposed that there was a singular, chief deity which was known as Ahura Mazda. The belief system's influence on other religions in the area can be seen in the emphasis on light, fire, purification, free will,  good vs evil, and the eternal nature of a soul.

But are there still Zoroastrians in the world today? The ancient religion is somewhat heterodox in  the variation of day to day practice, but orthodox in that certain traditions are universally acknowledged by the broad spectrum of adherents.