al Tusi – Discoveries of Islamic astronomy
Al Tusi in his observatory (ca. 1259 AD) Nasir al Tusi was born in Iran in 1201 AD, as the Seljuk Empire was falling apart. The Seljuks were Turkic people. But al Tusi, [...]
27
07, 2017
23
06, 2017
Where does salt come from?
A pile of salt In the Stone Age, people didn't need to find salt, because they were hunting a lot of their food, and eating a lot of red meat. [...]
