Oscar Reutersvard

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Impossible figures

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Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Aurochs. Bos primigenius. Skeleton. Extinct animal. Skeleton of an Aurochs, an extinct wild ox.

6 Animals We Ate Into Extinction

Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society

12 Novels Considered the “Greatest Book Ever Written”

Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar

Ten Days That Vanished: The Switch to the Gregorian Calendar

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

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

7 of History's Most Notorious Serial Killers

Oscar Reutersvard

Swedish artist

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creation of impossible figures

In number game: Impossible figures
…these drawings—also called undecidable figures—was Oscar Reutersvard of Sweden, who made them the central features of a set of Swedish postage stamps.
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