Waldemar Haffkine is largely unremembered, despite developing vaccines against both cholera and bubonic plague.

Italian physicist Ettore Majorana disappeared mysteriously in 1938.

Fraudster James Reavis claimed to own 18,000 square miles of the American West in the 1880s.

Does shooting a ghost constitute murder?

In 1901, two English academics came to believe they'd passed through a memory of Marie Antoinette.

Some New Englanders in the 1800s believed that tuberculosis symptoms were caused by the dead.

In the 1800s, France, England, and the United States each undertook to move a massive Egyptian obelisk.

The first Black American military pilot led a stunning career in wartime France.

In 1932, two German airmen became stranded in northwestern Australia.

In 1817, a young woman claiming to be a kidnapped Eastern princess appeared in the English village of Almondsbury.

Linda Burfield Hazzard's "fasting cure" killed multiple patients in the early 20th century.

In the early 1900s, two young brothers made several daring trips across the United States.

In London in 1762, a ghost accused a man of murder.

In 1944, an English pointer gave heart to an Allied prison camp in Sumatra.

In 1977, a German tourist spent three days in Bangor, Maine, thinking it was San Francisco.

In 1931, Ida Wood died hoarding a great fortune -- and a great secret.

Play along as we untangle eight strange-sounding situations using yes-or-no questions.

In 1928, the world's third-richest man inexplicably fell from an airplane.

After losing his sight at age 25, James Holman became the most prolific traveler of his day.

Joseph Medicine Crow's path to destiny ran through the battlefields of World War II.

George Parker Bidder could do stupendously difficult arithmetic in his head.

Eccentric adventurer John Hornby clawed a living from the inhospitable tundra of northern Canada.

Friedrich Kellner kept a secret diary to record the crimes of the Third Reich.

Mildred Norman gave away her possessions to walk North America in the cause of peace.

Play along as we untangle six strange-sounding situations using yes-or-no questions.