Grown, not built

The International Space Station, usually known as the ISS, is probably the most expensive single structure the human race has ever constructed. The reason being that each new module of it has to be first made here on Earth and then launched into orbit aboard a rocket. The end result is a slightly outlandish looking assemblage of seemingly disjoint pieces. Those modules, however, fit together perfectly and currently form the largest habitable space station in human history.(Read more ...)