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)
Monday, February 9, 2015
Coming into the Country
Today's Astronomy Picture of the Day shows layered rocks near "Mount Sharp" on Mars. Layers...cross-bedding and more. Oh, for a rock hammer.