My Opera is closing 3rd of March

Cronache di Sarvegia

...because every new challenge hides an opportunity

Image 20 of 27

Piergiorgio Odifreddi illustra le proprietà del Nastro di Möbius

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Name: P8063641.JPG
Access: Publicly available
Camera: OLYMPUS SP510UZ
Original resolution: 1024x768
Shutter Speed: 0.025 sec
F-number: f/3.7
Picture taken: 2011:08:06 23:27:17