The moon's closeness is a huge advantage: To make it habitable, we would first have to bombard it with water-ice comets, a tricky endeavor best attempted with the many resources waiting on and near Earth.

Terraforming our moon will take many decades and vast abilities. Before we can begin, we'll have to master the resources of our solar system - especially transporting raw masses over interplanetary distances.

Our moon was born too small to harbor life. It came from the collision of a Mars-sized world into the primordial Earth. From that colossal crunch spun a disk of rocks that condensed into a satellite.

I've always felt that specialization is best left to the insects.

True twins share womb chemistry and endure many fateful slings and arrows together. The fabled connection between twins is true in my case.

Invoking nature with its implied supremacy ignores that many cultures have fundamentally differing ideas of even what nature is, much less how it should work.