I think it was over the last 5 decades, with the final genome-project completing the mapping human genomes just a few years ago. Why? Is that somehow germane?
Perhaps you’d like to argue that 20th/21st century scientists thought of everything by themselves? It seems to me that those who made these discoveries had to be educated men to begin with.
What knowledge did they enter their respective fields with? Naturally, it was the knowledge accumulated over centuries, or millennia by others. Those who were, nearly to the man, believers in God.
So... What’s your point?