What is about to follow are simply my personal thoughts and intuitions about the subject matter. It is not written or copied from any Hindu text therefore it should be considered as my personal commentary.

I have often wondered how the highest knowledge and the most superior intelligence that conceived the Vedas could have existed thousands if not millions of years ago. If Ram chandraji himself was the first human avatar, i.e. about 1-2 millions years ago, the Vedas already existed, so they are much older than even that! If man before Ram chandraji was primitive then how could these Rishis have so much intelligence and knowledge, that too far superior than what we have today. According to Hinduism the Vedas are immortal they always existed and that the first yuga was the most pure, the Sat Yuga in which all human were of the purest form. This is contradictory to science. If these Rishis are from an age much earlier than Ram then what form were these Rishis? They could not have been humans. If they had such knowledge, no species on earth had a nervous system evolved enough to carry this intelligence. Could it be that these Rishis were not in physical form? Could it be that these Rishi were Siddhas - another energy form of enlightened souls? The Vedas are called the Shrutis - that which is not conceived by the mind but that which comes from consciousness directly. If the Rishis were not human then the Vedas were not conceived by the mind, if they were enlightened being could it be that they channeled this eternal truth some of which is now in the Vedas? That truth could have later been conveyed in the form of Sanskrit mantras to enlightened humans when the human nervous system had evolved enough to carry it. Also, these Rishis or Siddhas existed in different parts of the world, California (Kapilla Rishi), in Nova Scotia (Nava Kosha), in Germany, Mesopotamia, Afghanistan, Indonesia, etc. A number of references in our ancient texts refers to places elsewhere in the world. Mt. Meru is in the middle east and some of the other places along the Tigris and Uphretis (where man first started farming), also the Soma plant referred to in the Vedas is found in the middle east and Afghanistan.
These Siddhas or Rishis are eternal and still exist today. In the Yoga Vasistha, Ram chandraji is given the highest knowledge by Rishi Vasistha. It could be that Vasistha may not even be a human but a Siddha and Rishi Vasistha is still there today and will be there till the end of creation. Although it may seem strange to us today, I think that in earlier ages Hindus accepted other forms as a part of existence and not something super natural. Even enlightened souls today would consider the same and are in fact able to see and communicate with other forms in existence.
Hindus worship every aspect and form in creation, that is why everything created by the Divine, permeated by the Divine is considered a part of the Divine and not separate from it. That is why every form is worshipped. In Hinduism we have so many Devi Devatas, Rishis, Siddhas, and many other forms (including energy forms that may not even be visible to the human eye) are mentioned in our text. All co-exist and are part of Divinity. It is strange that modern man refers to non-earthly forms in existence as extra terrestrials, something alien and other things super natural. In Hinduism these may be considered Devi-Devatas, Rishis, Siddhas, and other life / energy forms and not something extra ordinary. Amazing! :)