December 1973. Cover art by John Schoenherr illustrating “The Hellhound Project” by Ron Goulart. ALSO: “The Sins of the Fathers” (serial, part 2 of 3) by Stanley Schmidt; plus stories by Roger A. Beaumont and others. FEATURES: editorial, “Do You Know Your Scientific Experts?” (science essay) by Joseph Stacey; “Beyond the Blue” (science essay) by Walter B. Hendrickson, Jr.; book reviews by P. Schuyler Miller; Brass Tacks (letters). Interior artwork by: John Schoenherr, Frank Kelly Freas and others. Editor: Ben Bova.