Donald Trump, the mercurial real estate tycoon and media personality who, much to the surprise of one and all, has become the front-runner for the Republican nomination for president opened his mind just a little about his attitude toward space exploration, according to a Saturday story in Forbes. In an answer to a question put to him about sending humans to Mars, the current focus at NASA, Trump said, ““Honestly, I think it’s wonderful; I want to rebuild our infrastructure first, ok? I think it’s wonderful.” In other words, dreams of going to Mars must take a back seat to...