At Cornell University, researchers are working on a new table napkin made of nanofibers that can advise of the presence of microorganisms you don't want to ingest. Coated with antibodies, proteins, and dyes, these wipes have successfully identified E. coli by assuming a yellow hue. Adrian Monk will doubtless be first in line to buy them. (www.sensorsmag.com/1206/RDNapkin)