I think it’s quite possible what SD says that there were civilisations just like ours before us but they could have died out.
It is not only possible, it is a fact.
We know the following as facts:
There are submerged cities 11,000 years old which are incredibly well planned and laid out, with drainage systems that existed prior to the end of the ice age.
About 300 surgicial procedures(including brain surgery) are documented in the ancient Hindu medical encyclopedia Sushruta Samhita. 1000+ diseases are described, with their etiology, symptoms, treatments. About 600 plant, mineral and animal based medicines are categorised and 125 surgical instruments are described, including injections.
The ancients had batteries, portable mechanical computers to calculate the position of planets, and most likely had flashlights
The Sanskrit language is the worlds first formal language, it uses the same analysis as modern day computer languages and is still superior. It is currently being studied for its use in developing languages for AI.
The ancient Hindus had a vast maritime empire and spread their culture all around world. The Native Americans for example have a festival which worships Rama and Sita. Indonesia, Bali, Java, Cambodia, Thialand are all previous Hindu colonies. It is also clear the Indo-Europeans, such as the early Greeks and Egyptians are Hindus. This is in fact recorded by Greek historians themselves.
It is also known as fact that the ancient Sanskrit texts describe aeroplanes. There is even a separate class of texts known as “Vimana Vidya” the science of aeuronatics. An ancient Sanskrit text has been found which describes how to make a battery, almost identical to the one found in Baghdad. It has been constructed and tested and its voltage measured.
From descriptions in ancient Sanskrit text Indian scientists have successfully been able to create a new stealth material that absorbs infrared radiation, as well as a new spectrometer. At the end of the 19th century an Indian scientist called Talpade succesfully flew an aircraft constructed after looking at ancient Sanskrit texts, using ionic propulsion engines.
Other than the famous Giza Pyramids we have found several artefacts of megalithic engineering all over the world which are thousands of tons in weight and have perfect cuts impossible to be done without modern technology
10,000 year old teeth have been found in India which have perfectly drilled holes proving that there was dentistry in ancient times.
I mean who are we kidding? All of these are facts. It is blatantly obvious we are not the first technological civilisation. Everything we have found in ancient times
flies in the face of what modern history tells us.