It's not by any means the only challenge out there, but it's a particularly good one. It's multi-dimensional, drawing upon virtually every human talent imaginab

It's not by any means the only challenge out there, but it's a particularly good one. It's multi-dimensional, drawing upon virtually every human talent imaginable: technical, social, aesthetic, scientific. It's long-term, complex and multi-faceted, and incredibly tangible. Anyone can look up in the sky and find Mars. In human mythology heaven is almost always "up"; it seems to resonate with both ancient and modern mythology. I can't think of many other challenges that are as rich as this one.