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)
Sunday, March 26, 2017
Persistence of Life
Today's Astronomy Picture of the Day shows a tardigrade. An alien on Earth? Probably not, but a good example of the ability of life to adapt at the extremes.