William James Sidis: The Man Who Spoke 25 Languages - History of Yesterday

And even created his own language

The Smartest Man Ever In History - William James Sidis, Subscribe for more interesting videos By Mrs. All In One

William James Sidis - Lindaland

William James Sidis: The Man Who Spoke 25 Languages - History of Yesterday

Why isn't William Sidis as well known as Nikola Tesla or John von Neumann? - Quora

History: Supposedly the Smartest Man in the World Ever!, M.M. Montoya

Wonderful Boys of History Compared With Sidis; All Except Macaulay Showed Special Ability in Mathematics -- Instances of Boys Having Universal Genies - The New York Times

The Animate and the Inanimate by William James Sidis

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The guy in the picture is Stephen Hawking : r/facepalm

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Is William James Sidis the smartest human? - Quora

Who Was William James Sidis, The Smartest Person In The World?