These great hollow globes of artificial super-metals, and artificial transparent adamant, ranged in size from the earliest and smallest structures, which were no bigger than a very small asteroid, to spheres considerably larger than the Earth. (Olaf Stapledon, STAR MAKER)
Friday, December 12, 2014
Today's Astronomy Picture of the Day gives us a closeup of a rock. On Mars. Which shows evidence of crystals formed as a result of the evaporation of water that lay in...can we say it...Lake Sharp (?).