James Cameron talks about how his fascination with the world around him has driven his film career. James Duncan Davidson/TED/Courtesy of TED hide caption

itoggle caption James Duncan Davidson/TED/Courtesy of TED

Aficionados line up outside Hot Doug's, a gourmet hot dog diner in Chicago, in May. Owner Doug Sohn has announced that he will shut the doors in October after nearly 14 years. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

Angelo Mosso's "human circulation balance" machine worked like a seesaw to measure blood flow changes to the brain. Sandrone et al., 2014, Brain hide caption

itoggle caption Sandrone et al., 2014, Brain