I. The lizard people of Alpha Draconis 1 decided to build an ansible. The transmitter was a colossal tower of silksteel, doorless and windowless. Inside were millions of modular silksteel cubes, ea…

Lizards can regrow severed tails, making them the closest relative to humans that can regenerate a lost appendage. But in lieu of the original tail that includes a spinal column and nerves, the replacement structure is an imperfect cartilage tube. Now, a…