Astounding Science Fiction April 1953 (Volume 51, Number 2)
Illustrations by H. R. van Dongen, Pawelka. Cover by H. R. van Dongen (for "Mission of Gravity.")

Serial: "Mission of Gravity" (Part 1 of 4) by Hal Clement (first of the "Barlennan" stories.)

Novelettes: "Settle to One" by Charles Dye & April Smith
"The Ant and the Eye" by Chad Oliver.

Stories: "Allegory" by William T. Powers
"Family Resemblance" by Alan E. Nourse.

Science: "Nature Didn't Make It."

John W. Campbell's editorial is "The Fallacy of Null-A"; Book reviews by P. Schuyler Miller.