On D-Day, more than 160,000 Allied troops converged on a single stretch of coastline to begin the Normandy invasion — and turn the tide of World War II.

From the rise of the Third Reich and into the post-war era, the Hitler Youth were molded to be faithful devotees of the Nazi regime — and to turn on even their own parents if they spoke ill of Hitler.

Whether gorgeous or terrifying, these Native American masks reveal a group of cultures on the verge of disappearing forever.

These rarely-seen pictures of President John F. Kennedy's assassination, autopsy, and funeral reveal the full story of the shooting that shook the nation in Dallas, Texas on November 22, 1963.

Nicholas Winton rescued at least 669 children from the Nazis and kept it relatively quiet for nearly half a century.

These poignant Titanic sinking photos capture the disaster that took 1,500 lives one April night in 1912.

Learn about the ten richest people ever — and see if you can even wrap your head around fortunes that dwarf that of Bill Gates.

These heartbreaking Jacob Riis photographs from How the Other Half Lives and elsewhere changed America forever.

From his champion wrestling career to the eerie circumstances of his assassination, these facts about Abraham Lincoln may change the way you see the 16th president.

In 2013, a synthetic stimulant called flakka emerged in Florida — and wreaked havoc on users with its horrific side effects.

Better known as devil's breath, scopolamine more than lives up to its name.