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On her first day of workwinzir, the young bioengineering major climbed down the basement steps of a cancer laboratory in Berkeley, Calif., and caught sight of someone summarily beheading a mouse. The student, Elizabeth Vargis, felt faint. She graspe

Claudia Sheinbaum Claudia Sheinbaum Claudia Sheinbaum is set to make history as Mexico’s first female president when she takes office on Tuesday. The 62-year-old former mayor of Mexico City, a lifelong leftist, campaigned on a platform of continuity