Was the human microbiome healthier in ancient times?
The New York Times reports: The human microbiome — the trillions of microbes that live in our guts — was a stable ecosystem for tens of thousands of years before rapidly changing in industrialized countries, raising possible health concerns for modern people, scientists reported on Wednesday. In a study of Africans and South Americans, researchers identified more than 600 species of bacteria that may once have been common in the gut but are now rare or missing entirely from people…