"There is no vegetable life in our universe. There is only the scale of elements ranging from 842 to 966 on the extension of your own scale. At this high range, metals of complex kinds exist. There is none of what you call water, no vegetable world, no animal kingdom. Instead, there are energies, forces, rays, and waves, which are food to us and which nourish our life-stream just as pigs, potatoes, and bread are food to you. * * * * * "Trillions of years ago in your time-calculation, but only a few dozen centuries ago in ours, life arose on the giant world Kygpton in our universe. It was life, our life, the life of my people and myself, intelligence animating bodies of pliant metal, existing almost endlessly on an almost inexhaustible source of energy. "But all matter wears down. On Kygpton there was a variety of useful metals, others that were valueless. There was comparatively little of the first, much of the second. Kygpton itself was a world as large as your entire solar system, with a diameter roughly of four billion miles. Our ancestors knew that Kygpton was dying, that the store of our most precious element Sthalreh was dwindling. But already our ancestors had mastered the forces of our universe, had made inventions that are beyond your understanding, had explored the limits of our universe in space-cars that were propelled by the free energies in space and by the attracting-repelling influences of stars. "The metal inhabitants of Kygpton employed every invention they knew to accomplish an engineering miracle that makes your bridges and mines seem but the puny efforts of a gnat. They blasted all the remaining ores of Sthalreh from the surface and interior of Kygpton and refined them. Then they created a gigantic vacuum, a dead-field in space a hundred million miles away from their world. The dead-field was controlled from Kygpton by atomic-projectors, energy-absorbers, gravitation-nullifiers and cosmotels, range-regulators, and a host of other inventions. "As fast as it was mined and extracted, the Sthalreh metal was vaporized, shot into the dead-field by interstellar rays, and solidified there along an invisible framework which we projected. In a decade of our time, we had pillaged Kygpton of every particle of Sthalreh. And then in our skies hung an artificial world, a manufactured sphere, a giant new planet, the world you yourself are now on--Xlarbti! * * * * * "We did not create a solid globe. We left chambers, tunnels, passageways, storerooms throughout it or piercing it from surface to surface. Thus, even as Xlarbti was being created, we provided for everything that we needed or could need--experimental laboratories, sub-surface vaults, chambers for the innumerable huge ray dynamos, energy storage batteries, and other apparatus which we required.