On December 12, 1910, Dorothy Arnold disappeared from New York City's Fifth Avenue while dress shopping. Her maddening case has never been solved.

"It's a crazy story. I couldn't believe it. I never thought that a judge would declare someone dead without a certificate."

The "Vasa" was supposed to be a feat of engineering in 1628. But then, it buckled under its own weight and sank to the bottom of Stockholm Harbor.

In the 1920s and '30s, Alice Frank Stock lived on the same block in Munich as Adolf Hitler while he was rising to power.

A woman in the small village of Whiteparish used the slab for nearly a decade as a step-mount for her horse before she saw its inscription hiding beneath a layer of mud.

According to the Bible, John the Baptist was executed during Herod Antipas' birthday party at the behest of his future stepdaughter.

Go inside the sad story of "Typhoid Mary" Mallon, an Irish American cook who was found to be "patient zero" during a typhoid epidemic in early 1900s New York.

Believed to have inspired "The Great Gatsby," Oheka Castle was one of the most opulent party mansions on Long Island in the 1920s. Today, it's a historic hotel — and a popular filming location.

With a 6.5-foot wingspan and talons the size of a bear's claw, the harpy eagle is a predator of epic proportions. But sadly, this majestic bird is now at risk of disappearing for good.

The best science photos of the year will take you from the Siberian permafrost to a radish garden in space.

From a glow-in-the-dark moon to a planet where it rains diamonds, this is the most fascinating space news of 2020.