I watched the test flight of the Falcon Heavy today. Over and beyond the excitement of the launch was the excitement of watching the boosters land back safely. It occurred to me that there would be children watching today’s launch for whom boosters will always be able to be returned, and re-used. The notion that we used to discard such things will seem highly illogical to them. But for those of us who grew up accepting we blithely littered outer space in order to explore, today was simply amazing.