[freebeard]

I know it's my own thread, but it's the best match for this post:

Las Vegas is Building the World’s Largest Sphere

It's interesting that they build a[n admittedly] heavy UV sphere to carry the inside screen, and then cover it with a geodesic dome weather cover with an outside screen.

This instantiates R. B. Fuller's dream of a World Map on the East River next to the United Nations building in NYC for his World Game. At ?t=104 you see the Earth projected onto a geodesic dome.