Dak
mentat
Why aren't either of those necessitated by our physical environment? The space race was instigated and perpetuated by mutual political concerns, and steel was forged in order to create stronger material so that we could lay rail and build skyscrapers.
They were, that wasn't my point. Beavers build dams. That's what they do. The dams are constructed in slightly different sizes and shapes dependent on the land/water layout, and of different trees depending on the available wood (and sometimes trash lying around). But you don't see beavers inventing concrete and creating hydroelectric based lighting for their dwellings.