Portrait of Eli Whitney, frontispiece to Memoir of Eli Whitney Esq., by Denison Olmsted, 1846 (Linda Hall Library)

Portrait of Eli Whitney, frontispiece to Memoir of Eli Whitney Esq., by Denison Olmsted, 1846 (Linda Hall Library)

Eli Whitney

DECEMBER 8, 2022

Eli Whitney, an American manufacturer and inventor, was born Dec. 8, 1765, in Massachusetts. The son of a farmer, he graduated from Yale College in 1792. He is now known for two...

Ruth Belville

Ruth Belville, the "Time Lady," died Dec. 7, 1943, at the age of 89.

DECEMBER 7, 2022

Sojourner

Sojourner, a celebrated robot and space explorer, was launched toward Mars on Dec. 4, 1996, aboard a Delta II rocket.

DECEMBER 6, 2022

Robert Watson-Watt


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Chicago Pile 1 (CP-1)


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Jean-Baptiste Lepère


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John Dollond


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Christian Doppler


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Willem Piso


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John Barrow


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Edme Jomard


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Leslie Ward


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Patrick M.S Blackett


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