In the early 1900s, scientists discovered that each person belonged to one of four blood types. Now they have discovered a new way to classify humanity: by bacteria. Each human being is host to thousands of different species of microbes. Yet a group of scientists now report just three distinct ecosystems in the guts of people they have studied.
Blood type, meet bug type.
Gut Bacteria Divide People into Three Types, Scientists Say
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Seeded by tgstk2 View Original Article: 
The New York Times
Seeded on Wed Apr 20, 2011 8:15 PM
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