John Wood Campbell, Jr. (June 8, 1910 - July 11, 1971) was an influential figure in American science fiction. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact), from late 1937 until his death, he is generally credited with shaping the so-called Golden Age of Science Fiction. "The Last Evolution" was originally published in the August 1932 issue of "Amazing Stories" magazine.

They sought the final secret of the Universe.Show Excerpt ied a million times till he floated in a ball of blue-white fire. Scarcely visible, the air about him blazed with bluish incandescence of ionization. "Increase the power," suggested Morey. Fuller turned on more power. The blue halo was shot through with tiny violet sparks, the sharp odor of ozone in the air was stifling; the heat of wasted energy was making the room hotter. The power increased further, and the tiny sparks were waving streamers, that laced across the surface of the blue fire. Little jets of electric flame reached out along the beam of the ray now. Finally, as full power of the molecular ray was reached, the entire halo was buried under a mass of writhing sparks that seemed to leap up into the air above the man\'s head, wavering up to extinction. The room was unbearably hot, despite the molecular ray coolers absorbing the heat of the air, and blowing cooled air into the room. Fuller snapped off the ray, and put the pistol on the table beside him. The halo died, and went out a momen

John Wood Campbell, Jr. (June 8, 1910 – July 11, 1971) was an American science fiction writer and editor. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact) from late 1937 until his death, he is generally credited with shaping the Golden Age of Science Fiction.

The star Mira was unpredictably variable. Sometimes it was blazing, brilliant and hot. Other times it was oddly dim, cool, shedding little warmth on its many planets. Gresth Gkae, leader of the Mirans, was seeking a better star, one to which his "people" could migrate. That star had to be steady, reliable, with a good planetary system. And in his astronomical searching, he found Sol.With hundreds of ships, each larger than whole Terrestrial spaceports, and traveling faster than the speed of light, the Mirans set out to move in to Solar regions and take over.And on Earth there was nothing which would be capable of beating off this incredible armada—until Buck Kendall stumbled upon THE ULTIMATE WEAPON.

John Wood Campbell, Jr. (June 8, 1910 – July 11, 1971) was an American science fiction writer and editor. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact) from late 1937 until his death, he is generally credited with shaping the Golden Age of Science Fiction.