A monotheistic religion which teaches Muhammad is the messenger of God(Allah). It is the world's second-largest religion with over 24% of the world's population. [...]

Twinkle, twinkle little star. How I wonder, what you are. Some of the things we've learned [...]

The effort of Christians to regain control of the Holy Land in the Middle Ages [...]

In search of new worlds: Sailing around the globe, traversing the deserts, jungles and frontiers. Going out into space and even within the Earth. [...]

Big events in mathematics that make the modern world possible. [...]

Important alchemical works of the Middle Ages [...]

Politicians and players of the Roman Republic and Roman Empire [...]

From antiquity to the modern city: How did we get here? [...]