Adrian van Maanen

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Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

Chapter 4 pg 42 - Chapter header of The Adventures of Tom Sawyer by Mark Twain. Published in 1884 by The American Publishing Company

Periods of American Literature

Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society

The 10 Greatest Basketball Players of All Time

Flamingo. (flamingos, birds)

Why Are Flamingos Pink?

Calendar showing the month of February

Why Are There Only 28 Days in February?

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Adrian van Maanen

astronomer

Learn about this topic in these articles:

spiral nebulae

In galaxy: The scale of the Milky Way Galaxy
…colleagues at Mount Wilson Observatory, Adrian van Maanen.
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