Does a prehistoric "monster" provide clues to an Ice Age puzzle? Is an odd wooden figure the explanation for a 60-year-old mystery or the key to a government cover-up?

What does a vintage fire engine tell us about what really destroyed San Francisco after the 1906 earthquake? Does a 10,000-year-old mastodon skeleton reveal a shocking story of greed and murder inside one of our nation's most esteemed universities?

Did the Japanese send weapons of mass destruction to the US mainland during World War II? Is a statue of illusionist Harry Houdini haunted? Does an old hatchet hold the key to one of the nation's most sensational unsolved murders?

Bonnie and Clyde's Gun - The Iwo Jima Flag - The Aerotrain 1955 - The Deep Sea Anglar Fish - Who reach the North Pole First - 1960 100,000 feet parachute Trial.

Artifacts include the "Spruce Goose" aircraft, a T-Rex skeleton, President William McKinley's torn nightshirt, empty picture frames from an art heist, a watch from the Johnstown flood, and the invention of the Slinky.

In the National Museum of Nuclear Science and History, there's a small vial that once contained a wildly popular drug called Radithor. Don Wildman discovers how this doctor-approved "cure-all" end up destroying countless lives.

Artifacts relating to the attempted assassination of Teddy Roosevelt, the Cleveland, OH torso murder serial killer, the capture of the land speed record by the U.S. from the British, the sinking of the Titanic, the civil rights movement, and Bigfoot.

The Theremin an electronic instrument in the Philly archives played into spy scandals, Silly Putty and the Tacoma Narrows Bridge are featured.

A New York City museum displays an artifact from an airplane which brought dread and destruction to the city; a metal staircase from the U.S. Embassy in Vietnam is on display at the Gerald Ford Museum in Grand Rapids, Michigan.