A still from the surveillance camera footage shows the fainting man (top left and bottom right) lying alone in a subway car, as the few remaining occupants hurry away. YouTube hide caption

itoggle caption YouTube

Third-year medical student Allie Tetreault, left, talks with Gabrielle Nuki, 16, at Maine Medical Center in Portland, Maine. Gabrielle helps med students practice patient care. Patti Wight/MPBN hide caption

itoggle caption Patti Wight/MPBN

A woman holds the saffron crocus, during the saffron harvest in Herat, Afghanistan (left). Saffron flowers are collected in Saint Hippolyte, eastern France (right). Since the stigmas need to be picked from the flowers by hand, saffron is the world's most expensive spice. Majid Saeedi/Getty Images; Maxppp /Landov hide caption

itoggle caption Majid Saeedi/Getty Images; Maxppp /Landov

Jason Wright, seen here during his 15-month deployment to Iraq, served in the military for nine years before resigning last week. Courtesy of Jason Wright hide caption

itoggle caption Courtesy of Jason Wright

Blaine Lotz of Edna, Kan., is this year's winner of the prestigious World Livestock Auctioneer Championship, hosted by the Livestock Marketing Association. Morgan Leigh Meisenheimer/Livestock Marketing Association hide caption

itoggle caption Morgan Leigh Meisenheimer/Livestock Marketing Association

There's new evidence reaffirming that eating foods with fat — everything from avocados and salmon to dairy fat — doesn't make us fat. eyecrave LLC/iStock hide caption

itoggle caption eyecrave LLC/iStock

The first edition of Charlie and the Chocolate Factory and the original hero Golden Egg from the film Willy Wonka and the Chocolate Factory on display at Profiles In History in Calabasas, northwest of downtown Los Angeles, on July 19, 2012. Frederic J. Brown/AFP/Getty Images hide caption

itoggle caption Frederic J. Brown/AFP/Getty Images

Discovery Channel identifies the shark in this promotional image as the "Shark of Darkness." And in the "documentary" by that name, supposed scientists describe how this monster "submarine" shark is over 30 feet long. But submarine sharks aren't real, and the documentary is fake — an important fact critics say is easy to miss. Chris Fallows/Discovery Channel hide caption

itoggle caption Chris Fallows/Discovery Channel

Martha (right), an extinct passenger pigeon, at the Smithsonian's Natural history Museum in Washington. The passenger pigeon was once the world's most plentiful bird. Sept. 1 is the centenary of the bird's extinction. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

This hangout spot in East Baltimore — like the rest of the city's outdoor spaces — now comes with a police-enforced nighttime age limit. Children under 14 must be indoors by 9 p.m. each night, all year long. Kids age 14-16 can stay out a little later, until 10 p.m. on school nights and 11 p.m. on other nights. Courtesy of Brian O'Doherty hide caption

itoggle caption Courtesy of Brian O'Doherty

Across Washington State, hydroelectric dams are blocking salmon as they migrate to their spawning grounds. Enter the salmon cannon. Ingrid Taylar/Flickr hide caption

itoggle caption Ingrid Taylar/Flickr

Hadrian's Wall marks the Roman Empire's northernmost boundary, and at one point is less than a mile from today's border between England and Scotland. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

Lee Child is the author of 19 Jack Reacher novels — and is currently working on the 20th. Sigrid Estrada/AP/Random House hide caption

itoggle caption Sigrid Estrada/AP/Random House