Bat bugs typically feed on bats. But when no bats are available, these parasitic creatures will happily feed on humans, too. Graham Snodgrass/AFPMB/Flickr hide caption

Emery Brown is a professor of computational neuroscience and health sciences and technology, with a joint appointment at MIT and Harvard University. He is also a professor of anesthesia at Harvard Medical School. MIT hide caption

Hazel Dickens onstage at 2008's Hardly Strictly Bluegrass Festival in San Francisco. Anthony Pidgeon/Redferns hide caption