Stories written by
Carl Zimmer, mosaic.com
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Why do we have allergies? A Yale immunologist searches for answers
Allergies such as peanut allergy and hay fever make millions of us miserable, but scientists aren’t even sure why they exist.
Carl Zimmer, mosaic.com
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Why do we have blood types?
More than a century after their discovery, we still don’t really know what blood types are for. Do they really matter?
Carl Zimmer, mosaic.com