Simply plug the Scentee device into your iPhone jack and let the scent of grilled meat waft your way. YouTube hide caption

This riboflavin-rich material can be used to print intricate, microscopic structures in three dimensions. Courtesy of North Carolina State University hide caption

Clostridium difficile, a bacterium that causes severe diarrhea, can be difficult to treat with antibiotics. Stefan Hyman/University of Leicester hide caption

Banksy's "Sirens of the Lambs" started its tour of New York City in — naturally — the Meatpacking District. BanksyNY/Youtube hide caption

University of Florida researcher Jennifer Stamps administers the peanut butter sniff test to a volunteer. Jesse S. Jones/University of Florida hide caption

Your skin knows the time. iStockphoto.com hide caption

Hair of the Dog releases a few bottles of Dave a year. In September, the 12 bottles of Dave on sale for $2,000 apiece sold out within a few hours. Courtesy of Alan Sprints hide caption

Unless it's strep throat, antibiotics are unlikely to help you get over a sore throat. iStockphoto.com hide caption

In a study of 4,000 pregnant women, fish accounted for only 7 percent of blood mercury levels. JackF/iStockphoto.com hide caption

University of Maryland's Jaydev Desai shows off a prototype of a robot that he and colleagues are developing to minimize harm to patients during brain surgery. John T. Consoli/University of Maryland hide caption