Crisco was the original product made with partially hydrogenated soybean oil, which contains trans fats. Today, Crisco has only small amounts of the fats. Tony Dejak/AP hide caption

Shelburne Farms' clothbound cheddar has a bright yellow color because it's made from the milk of cows that graze on grasses high in beta-carotene. Courtesy of A. Blake Gardner hide caption

Students play tag at Ruby Bridges Elementary in Alameda, Calif. The school has expanded recess time with help from the nonprofit group Playworks. Eric Westervelt/NPR hide caption

This colorfully illustrated French and Hebrew Passover Haggadah was published in Vienna in 1930. Caption on the image: "Eating Matzah." This restored document is part of an exhibit at the National Archives in Washington, D.C., that opens Nov. 8. National Archives hide caption

Tristan Walker founded Code2040, an internship program designed to bring Latino and black engineering undergrads to Silicon Valley. David Paul Morris/Bloomberg via Getty Images hide caption

One man's sewage is another man's drinking water. As wastewater comes through this pipe, straw-like filters get rid of any contaminants wider than a human hair. That's just one step of the purification process. Amy Standen/KQED hide caption

Sherman poses for a photo in New York in July 2012. Verena Dobnik/AP hide caption

A worker unveils a floor mat bearing the logo of Twitter on the floor of the New York Stock Exchange. Andrew Burton/Getty Images hide caption

The question of how humans process the flood of electronic media was a central part of the work of Stanford University sociology professor Clifford Nass, who died recently. Citing multiple studies, Nass said people often overestimate their ability to multitask. iStockphoto.com hide caption

Militias from towns throughout the country's west parade through Tripoli, Libya, in 2012. Analysts say the country is awash with heavy weapons in the hands of militias divided by tribe, ideology and region. The central government has little power over the gunmen. Abdel Magid Al Fergany/AP hide caption

The limousine carrying President John F. Kennedy races toward the hospital after he was shot in Dallas on Nov. 22, 1963, with Secret Service agent Clint Hill riding on the back. Justin Newman/AP hide caption

Soprano Nigia Hunt is a junior at Durham School of the Arts. She and others are singing for Paul Kwami, auditioning for a solo in the Duke Performances concert. Leoneda Inge/NPR hide caption

Nathan Bedford Forrest served as the first grand wizard of the Ku Klux Klan. The high school that bears his name, now majority African-American, has been at the center of controversy for decades. Mike Wintroath/AP hide caption