lunedì 17 agosto 2015

NYT Science: The Multicolor Signals of Mucus

The Multicolor Signals of Mucus
By C. CLAIBORNE RAY

As an illness like a cold progresses, the color changes, and even green mucus is normal.

Published: August 18, 2015 at 06:00AM

via NYT Science http://ift.tt/1IWHZbW