New scientific investigations from across the globe help piece together the untold story of prehistoric women in this new documentary. The latest research separates fact from fiction and sheds new light on our ancient foremothers. For more than a century and a half, experts uncovered and analyzed ancient human remains to understand the story of the earliest Homo sapiens species but focused primarily on the male half of the species. Through advanced science, such as microtomography - using X-rays to recreate virtual 3D models - as well as comparing the body of a modern-day female javelin-thrower to an ancient female spear-thrower, Secrets of the Dead's revelations defy previous understanding of the power dynamics of ancient society.

In 1937, the Hindenburg airship exploded into flames upon landing and 36 people were killed in the horrifying crash, shocking the world and sealing the fate of airship travel forever. For decades, the exact cause of the Hindenburg's crash has remained a mystery. Now, recently discovered letters, maintenance reports and company memos reveal the unfortunate errors that led to the disaster. More than 80 years later, experts suspect that, had critical construction flaws been fixed at the time, the airship might not have exploded.