PSYCHOPHONE

Did Thomas Edison invent this machine to listen to the secrets of the dead?
Gwen Wright puts it to the test

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Video: Interview with Paul Israel

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WAR DOG LETTER

Does this letter reveal a top secret army program to turn man's best friend into a weapon of war?
Tukufu Zuberi takes a close look

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Feature: Cat Island Documents

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PANCHO VILLA WATCH FOB

Did the owner of this fob bear witness to Pancho Villa's attack on an American border town?
Guest detective Eduardo Pagan investigates

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Feature: The Mexican Revolution

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LET US SOLVE YOUR MYSTERY

Do you have an object you think played a role in American history?
Submit your story to the History Detectives now

Investigative Techniques: Document Examination

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