why hasn't anyone ever directly measured it - like on a frozen lake multiple miles long for instance
The curvature is visible. That's why you see the tops of ships at the horizon before you see the rest of the ship. That's like the most basic observation one can make and what I learned as a little child when it came to the topic of the round earth.
It truly baffles me how anyone can deny that.
Here is how you measure the curvature. Why would you ever claim that nobody has done this?
https://www.astro.princeton.edu/~dns/teachersguide/MeasECAct.html
This is what you wrote about Stonehenge:
It wasn't built by anybody except modern man all of 150 years ago
Your cannot even be consistent in your own ramblings.
So when was it build? 150 years ago or by the Romans? Can you make up your mind?
It wasn't built by anybody except modern man all of 150 years ago.
There are images and descriptions of it that are hundreds of years older than 150 years ago.~
For years centuries, 700 years, both kings and dukes considered it Roman.
So what is it? 700 years ago or 150 years ago.
Educate yourself.
Read the wiki
This wiki?
Archaeologists believe that Stonehenge was constructed from around 3000 BC to 2000 BC. The surrounding circular earth bank and ditch, which constitute the earliest phase of the monument, have been dated to about 3100 BC. Radiocarbon dating suggests that the first bluestones were raised between 2400 and 2200 BC,[3] although they may have been at the site as early as 3000 BC.
What Arabs you dumbass?
The Arabs who conquered Asia Minor and in whose wake the Turks settled there. What on earth does that have with pyramids. There are no pyramids in Asia minor.
Before the Arabs invaded, there were no Turkic people in Anatolia.
Neanderthals came from Africa so everybody on the planet is black. You're such a fucking retard.
Are you drunk?
They still weren't Turkic. The Turkic people immigrated to the region during the Arab conquests.
Stonehenge was build a long time before the Druids existed. There are descriptions and depictions of it that are centuries old.
You have no fucking idea what you are talking about.
So a Turkic people spread over Europe.
Anatolians 5000 years ago weren't Turks. Turks are recent migrants to the region.
The Romans destroyed all former traces of any druids off the British Isles.
Stonehenge was built thousands of years before the Druids.
Your ignorance is truly pathetic.
Arabs existed before Islam. Long, long before Islam.
You are not making any sense. Your statements are nonsensical, factually incorrect and incomprehensible.
Something is seriously wrong in your head.