Eighty years ago today, Amelia Earhart was declared legally dead, having been missing in the South Pacific for a year and a half. Ohio State aviation scholars Brian Strzempkowski and Shawn Pruchnicki explain the technologies that pilots, air traffic controllers and airlines use today to avoid getting lost, and to reduce the chances a plane might go missing forever.

Some face-tracking programs claim to be able to read a person’s emotions from a picture. But a new study shows that this software struggles with darker skin. Even when a black person is smiling, the computer assumes that the person pictured is angrier and unhappier than a white person with a similar expression.

Schadenfreude – the pleasure people feel at others’ misfortune – has long vexed psychologists. Psychologist Shensheng Wang and his colleagues have developed a new framework to better understanding schadenfreude, one that views the emotion as an offshoot of a sinister impulse.