BYM
So what?
When did I state that Chazal knew every scientific fact known today? I am not stating they did or didn’t it’s irrelevant.
The question was what indications do we have of Chazal’s greatness.
I answered simply.
The Rambam had a pretty thorough knowledge of Shas and likewise had a pretty thorough knowledge of the Science that was known in his day.
And based on that the Rambam states that it’s obvious to anyone who learns Chazal that they knew far more scientific facts then were known in their days and could only have developed that knowledge from Torah.