Of Human Ideas, making an “Indoors” was a real Rip-Snorter! Nothing had prepared Us for it! We knew of caves and hives and nests and burrows, but actually constructing things with an inside and an outside, all at once- marvelous. It took Us quite a while to summon the courage to try out a doorway, and many of Us are still not comfortable sampling alternative spatial concepts. Just don’t seem quite Natural for Us, being Outside Critters, for sure. Still, it is an important idea, however disorienting it may be. Inside, Outside, Inside, Outside. What’ll they think of next?