History / technology - Aga Khan Museum's "akhdh al-kawakib" (lit. "taking the stars") - an elaborate inclinometer used to locate & predict the positions of the Sun, Moon, planets, and stars, determining local time given local latitude, surveying, triangulation, & to cast horoscopes. It was used in classical antiquity, through the Islamic Golden Age, the European Middle Ages & Renaissance. In the Islamic world, it was also used to calculate the Qibla and to find the times for Salah.
i simply like pictures from all sorts of things.the pictures i blog here are not mine. i found them here on tumblr or all over the internet. if you see your picture here and it is not linked to you or you want to be credited, please contact me =)>
Horse heads on the wall of Chauvet Cave, France - photo by some.maniac, via Flickr; "Fourteen different animal species are depicted in the Chauvet Cave. Here, three beautiful horses' heads face one another." - MetMuseum