Popularly known as "black boxes," event data recorders (EDRs) have helped investigators solve the mysteries of airplane crashes for decades. Now they've become standard in almost every new car sold.

Law enforcement officers said they were investigating multiple possible scenarios that may have led to the fatal crash last ...

BEIJING--The second “black ... recorder, an orange cylinder, on a mountain slope about 1.5 meters (5 feet) underground, state broadcaster CCTV said. Experts confirmed it was the second black box.