Is Earth indomitably real? (was The reality of Manhattan vs. rolling

> It
> might be similar to living in a very dense rain forest
> w/o the nasty limitations of gravity.

What about the nasty limitations of micro gravity? Toilet design springs to
mind. As does CO2 build up and the required AC to counter it. Humans are
also used to living in a fundimentally 2D world. We build everything with a
sense of up and down. We navigate in 2 dimensions, and most cannot do 3D
math inside their head while 2D is simple. We need surface friction to move.

Skylab was designed to be a 'total 3D world'; without a cohesivve sense of
up and down. No one who went there liked it.

John