Jet lag is a common travel nuisance that can turn an exciting journey into an exhausting ordeal. It occurs when there’s a mismatch between your internal body clock and the new time zone you’re in.
Cash, who as a young public-health researcher in South Asia in the late 1960s showed that a simple cocktail of salt, sugar and clean water could check the ravages of cholera and other ...
from brain cancer this week, his wife by his side. He was 83. His greatest achievement — oral rehydration therapy for diarrhea — is something so simple that people can be trained to do it at home.