Commercial and military applications of rockets and satellites have always been important in improving access to space. There's no comparable reason to deliver

Commercial and military applications of rockets and satellites have always been important in improving access to space. There's no comparable reason to deliver a probe to the Mariana trench or to dig a few km into the surface. And we do know exactly how bicycles work. EXACTLY. This one is up there with the one about NASA spending millions on a space pen.