James Troup examines a 19th century mystery surrounding gravity-defying footprints from an unknown source.
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MUSIC
Lonely Path_Underscore
Licensed via Warner Chappell Production Music Inc.
Isolation_Full Mix
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Floating Beyond Caution_Full Mix
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Insidious Danger_Minimal
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Dark Voyage A_Full Mix
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Scary Story_No Percussion
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Disembody_No Percussion
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Code Breaker_Ambient
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Faceless_No Percussion
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Observation Pulse_Light Version
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STILLS
Union Stockyards
Chicago History Museum/Getty Images
Ilfracombe
Universal History Archive/Getty Images
A grand balloon ascent, Batty's, Thursday, July 1st, 1852 - three men and a woman holding flags while sitting in the basket of an ascending balloon labeled Royal Hippodro
HUM Images/Getty Images
Common or Eurasian badger (Meles meles), 1828.
Print Collector/Getty Images
Antique Print Of A Beaver
GraphicaArtis/Getty Images
'The Four Seasons, Autumn', c1600. Artist: Abel Grimmer
Print Collector/Getty Images
Fallen Angel
Hulton Archive/Getty Images
Australian Kangaroo
Hulton Archive/Getty Images
View Of The Elector Of Saxonys Bear-Garden
Print Collector/Getty Images
Tracking Rabbits Through the Snow
Sepia Times/Getty Images
Colonial Troops In England For Jubilee
London Stereoscopic Company/Getty Images

VIDEO
Trans-Siberian Railway
Abraham Raphael - Footage/Getty Images
Indigenous animals in the Sydney Zoo
Archive Farms - Footage/Getty Images
WS POV Train travelling through mountains covered by snow, train entering station AUDIO/ Russia
Film Images Sarl - Footage/Getty Images
Southwark Cathedral in London, 1930
Grinberg, Paramount, Pathe Newsreels/Getty Images
Lower Broadway in NYC, 1896
Silverwell Films/Getty Images
1905: MOVING TRAIN: WS (POV Above cab) Steam train locomotive whistle w/ white steam escaping, SOT blowing twice, TD MS Railroad tracks, HA WS Approaching & entering railway truss bridge over unidentifiable river.
The March of Time/Getty Images
Englich countryside, manors
The March of Time/Getty Images
Captain Bob Bartlett and crew of schooner "Effie M. Morrissey" work to free ship from ice using poles and explosives
Grinberg, Paramount, Pathe Newsreels/Getty Images
Investigation to show Americans the problem of rum running between Havana and New York
Grinberg, Paramount, Pathe Newsreels/Getty Images
The German retreat and the great Canadian victory at the Battle of Arras, part 4
National Film Board - Footage/Getty Images

EXTERNAL CREDITS
James Troup
https://www.imdb.com/name/nm4690103/