Read more about the Hindenburg disaster: https://www.smithsonianmag.com/smithsonian-institution/80th-anniversary-hindenburg-disaster-mysteries-remain-180963107/ Seventy-five years after the tragedy, a curator at the National Postal Museum made a discovery that shed new light on what happened to the doomed dirigible

A team of experts say the deadly explosion was caused by a buildup of static electricity after flying through a thunderstorm.