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Subjects asked to decide whether androgynous faces are masculine or feminine tend to favor masculinity if they are either given a hard ball to squeeze while they select answers on-screen or told to press heavily while circling answers on carbon paper; facial interpretation tends toward femininity when subjects squeeze a soft ball or circle lightly.
Minimum number of baboons forced to smoke crack in a 1989 study testing the efficacy of cigarettes as a drug delivery device:
