The SciencesChanging to Stay the SameBy John Rennie on April 1, 1996Advertisement Rights & Permissions ABOUT THE AUTHOR(S)John Rennie is a former editor in chief of Scientific American.Recent Articles by John RennieIcefish Study Adds Another Color to the Story of BloodGene Drives Shown to Work in Female MiceSafe Limit for Global Warming Is Lowered Dramatically by Experts