Which famous figure was the first celebrity to endorse Thomas Edison's phonograph invention, recording their voice in 1878 which significantly boosted public interest in the device?

Throughout history, famous personalities have lent their names and faces to promote groundbreaking inventions and discoveries. Some endorsements helped catapult innovations into mainstream success, while others created unexpected historical connections. Test your knowledge about these fascinating intersections of celebrity and scientific advancement that shaped consumer adoption of world-changing technologies.

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Mark Twain (Samuel Clemens)
President Rutherford B. Hayes
P.T. Barnum
Sarah Bernhardt