Between the last quarter of the twelfth century and the first quarter of the thirteenth, the Mongols constituted what was probably the most powerful army in the world, with which they created the most extensive territorial empire that has ever existed. As we know, it was the work of Genghis Khan, wh
Pope Innocent III called for a crusade in August 1198, just months after his election, to liberate the Holy Land that Saladin had reconquered. The plan is to seize Egyptian ports to exchange them for Jerusalem. The kings of France and England were then at war while the Holy Roman Emperor still conte
A handful of ancient zircon crystals found in South Africa contain the oldest evidence of subduction, a key element of plate tectonics, according to a new study published in AGU Advances, the journal of the American Geophysical Union for research in the sciences. of Earth and space. These rare time
The story begins in Oropo, a city located on the border between Attica and Boeotia, on the coast where the Asopus River flows, the object of frequent disputes between the two and which would change hands several times over the years (today the modern Oropo is 3.2 kilometers from the coast, the place