Great unknowns: nine top scientists on the one mystery on Earth they’d like to solve - I love reading all these various questions from the scientists, it creates new and interesting perspectives in your head, new ways of looking and seing the world. Honestly I'm also completely transfixed by the first image in the article of planet Earth, just floating there in the deepest of space, doing it's thing, with all the oceans and enormous weather system of clouds and that blue glow around the edge. It's so unbelievably beautiful, isn't it? That's where we live, every single one of us. Take a look and think about it for a few seconds. www.theguardian.com #