Astronomy doesnt absoluts stonehenge?

[Sonnybonds]

Astronomy doesnt absoluts stonehenge?

Astronomy is researched be several civs but stonehenge still there in orleans.
is it a bug?

[Capsavian Hopewell]

Stonehenge doesn't disappear with that tech;  just its effects (of one free monument in every city) is canceled, once YOU research Astronomy.

You will still receive the culture bonus from that wonder though, and yes, the stones still stand tall and proud.  Your druids did a good job creating it.

I still can't believe so many people have Astronomy! 

* Capsavian Hopewell paddles away in his flimsy bark canoe, attempting to navigate the high seas, to no avail...

[Sonnybonds]

I see, so rules have changed in BTS. In the original it obsoluts when any civ had discoverd astronomy.

and dont worrry you are not the only one who hasnt discoverd astronomy yet.