This did not really happen. Cows' heads did not emerge from the bodies of people newly inoculated against smallpox. But fear of the vaccine was so widespread that it prompted British satirist James Gillray to create this spoof in 1802. H. Humphrey/Henry Barton Jacobs Collection, Institute of the History of Medicine, JHU hide caption

Irene Chen and Longlai Zuo, with the China-based company Quality Technology Industrial, show off their top-line phones, which cost about $100. Aarti Shahani/NPR hide caption

By measuring activity in different parts of the brain, neuroscientsts can get a sense of how some people will respond to treatments. John Lund/Getty Images hide caption

A screen shot taken from a video demonstrating how Iowa's digital driver's license would look on a smartphone. Iowa Department of Transportation hide caption

Social media provides voice to movements and helps drive them. Picking the right platforms for these sensitive conversations, though, is a sign of our growing digital sophistication. iStockphoto hide caption

You don't want to run into methicillin-resistantStaphylococcus aureus (MRSA) bacteria. A potential new antibiotic could help fight this bug. CDC hide caption

Michele Serros reads from Chicana Falsa during a 2012 event at Pegasus Books in Berkeley, Calif. artnoose/Flickr hide caption

Young members of the Baghdad Rowing Club practice on the river Tigris, close to the University of Mustansiriyah in the Iraqi capital. Alice Fordham/NPR hide caption