WHEN NASA astronaut Sunita Williams first went up into space, the first thing she remembers noticing, on looking out through the window, was that the earth was round. “Of course, I knew it was round. You learn that it’s round, and when you’re in aeroplanes sometimes you can see the curvature of earth. But I looked out of the window of the shuttle and I’m like, ‘Oh my gosh it’s round! It really is round.’” . http://www.heraldscotland.com/news/16340316.space-school-where-nasa-inspires-scottish-school-kids/