"Our Epics 'The Ramayana', 'The Mahabhaarata', 'The Puranas' etc can not be just stories. If we keep their association with GOD and all Godly things aside, we have a lot to observe particularly the scientific inventions of ancient times."
'Our' Epics are the standing proofs to state that our ancestors were way forward in various aspects. There were many things which we generally consider as 'Maya' (Magic) and unrealistic but the fact that many such magical things are today's realities, certainly prompts us that they WERE actually real and we need some more time to catch up ancient technology levels to achieve those wonders. Below are few such instances...
Pushpaka Vimanam: Ramayana explains the existence of a huge vehicle like a multistorey building which can stay and travel in the air. Now we have our aeroplanes.
Astra - Sastraas: With a simple mantra chanted, an arrow could bring fire, rain, cyclones etc. People could wonder how can a simple arrow can burn forests but those must be accepting the fact that the powerful nuclear weapons are tiny and should be able to draw similarities with current-day missiles. Who knows..? In future the missiles can come to size of arrows and be available to everyone like today's Guns.
Gynecology: We can see in Ramayana that Gods gave 'Amrutham' to the 3 wives of Dasaratha and after that they conceived. So there were some medical methods to correct the difficulties of fertility. Also if we observe in MahaBhaaratha, Dronacharya was born in a pot. This should be some form of test tube baby. Also when Gandhari, the mother of 100+1 Kauravas broke her womb, premature fetus came out. Then Vyasa kept them in some pots with few liquids and enables them to develop into babies. This is more superior to our incubator technology.
Communication: In Mahabharata, Droupadi calls Krishna and the message reaches him. Also Ekalavya does his education remotely by accessing his teacher's mind. So there must be some way to contact others through 'mind waves' instead of magnetic. This is no way difficult to assume with current-day's advancement of wireless communication system.
Skills: People and many animals used to speak to each other. So it must be possible for some animals to speak human language or for humans to speak animal's language. There is a concept of 'Kama rupa' in which people can be bigger all of a sudden in size. The Hollywood movie 'Hulk' tries to give some scientific explanation to this. Few people were able to fly and can appear and disappear at will. This also must be possible with further advancement in technology.
Amrutha: Viswamitra teaches two techniques 'Bala' and 'Atibala' to Rama and Lakshmana using which Lakshmana could conquer hunger and sleep for years. This is also superior form of living on fluids for years. Recently its revealed that with some form of Yoga, one can stay without food for years.The concept of 'Amrutha' to keep a person alive and young forever should also be possible.
Engineering: The concept of 'Rama Sethu', if observed keenly is a miracle of engineering ability. They explain the way the bridge was built. First they laid down big big trunks of trees and the rocks were dropped on top of them. Certainly the wooden things can stay afloat and the size depends on the requirement. Also the concept of 'Maya Sabha' in Mahabharata is another glimpse of advanced engineering in ancient times.
Geography: While sending vanaras to all sides of earth to search Sita, Sugriva explains the boundaries of earth. There we can see that though separated slightly by oceans, the land is almost combined. Also he explains about Rakshasas who could pull the flying objects. This is their representation of magnetic forces concentrated in certain areas.
Karna's 'Kavacha Kundalalu' concept is nothing but our bullet proof jackets.
We know that 'The chariot of Sun' has 7 horses. Its nothing but indirect explanation of Sunlight (white light) is combination of 7 colours.
We might trash them by saying that they are just stories with no witness but we shall at least agree that even the concept or thought of such inventions is not a simple thing. In fact, it's the conceptualization that is the base for any invention.
There is certainly a huge gap in transfer of knowledge from our ancestors to us, and so we are to start from the scratch. May be they deliberately didn't document the things as they wanted us to start from level 0 or it is the part of human life cycle from one age (Yuga) to another! But certainly one thing keeps creeping in our mind, "Are we inventing or Re-inventing?"...