From the bed of an intensive care unit, Samavedam Sriramachari today recalled his two decades of research that helped demystify the poison gas which caused the worst chemical disaster in human history. The Indian pathologist, who helped the world fathom how the methyl isocyanate gas that leaked from the Union Carbide factory in Bhopal 25 years ago killed and harmed thousands of people, is now himself fighting a lung disease probably...

As the 6-year-old son in an upper-class Brahmin family, Bindeshwar Pathak wanted to know what would happen if he touched a scavenger, one of India's "untouchables," stuck at the bottom of the country's social order and fated to collect and dispose of human waste. When he did, his grandmother punished him by forcing him to swallow cow dung and Urine, and making him bathe in water from the Ganges. "This...