The 11 smartest people in the world: About William James Sidis

William James Sidis, considered the smartest man alive, is believed to have an IQ of between 250 and 300.

The Sad Tale of William James Sidis - The Smartest Man Who Ever Lived

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The Prodigy: A Biography of William James by Wallace, Amy

The Story of the Most Intelligent Man in the World - Exploring your mind

Is William James Sidis the smartest human? - Quora

William James Sidis: The smartest man of all time

Life Lessons From 10 People With the Highest IQs Ever Recorded

William James Sidis (1898-1944) - Mémorial Find a Grave

10 people with the highest iq ever recorded by Yayasan Ulinnuha - Issuu

The Story of the Smartest Man Who Ever Lived and Why You Haven't Heard of Him / Bright Side