6. Spruce Goose, T-Rex Skeleton, President McKinley Nightshirt, Art Heist, Johnstown Flood, Slinky
Aired Dec 7, 201060 min
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.
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