@lni
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JastrowPlusieurs paésines, du calcaire métamorphique, provenant ici du Val d'Arno en Toscane. Les fissures et sels minéraux donnent des représentations de ruines fantastiques, alors que ce n'est que du caillou poli. Dation Roger Caillois, Galerie de Minéralogie du Muséum national d'Histoire naturelle #RêveriesDePierres
The Public Domain ReviewThis unique self-portrait, also known as “view from the left eye”, is the creation of Austrian physicist and philosopher Ernst Mach (famous for his work on supersonic fluid mechanics), who was born #onthisday in 1838. Read more about the image here: https://publicdomainreview.org/collection/self-portrait-by-ernst-mach-1886 #OTD
