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The Albigensian Crusade (1209–1229) was a 20-year military campaign launched to defeat the Cathars in southern France.
In the 19th century the fragmented German states united under the leadership of Prussia.
A town provides services that do not only meet the needs of its own population. Its scope of duties goes beyond its borders.
In certain cases, liquids do not mix together, and form layers instead. See what happens when we pour water over raspberry syrup.
The desire to become rich and spread Christianity, and advancement in sailing technology all encouraged European explorations in the 15th century.
The surface of the Earth has been formed into its present state both by external and internal forces. External forces shape the surface from the outside; hence, the name.
The Earth’s atmosphere acts like an enormous greenhouse.
Did Nero set fire to Rome on purpose? True or false?
One of the best-known and mightiest edifices in Rome since 80 AD, the Colosseum was once an infamous venue for gladiator fights.
This video is about the structure and uses of reeds and their effect on the environment.
One of the most significant Christian religious features of medieval Europe was the monastic movement.
The Pantheon is one of the most significant and best-preserved ancient Roman temples.
You will learn about the immensity of distances when talking about the solar system, the Milky Way or the entire universe.
This is a video presenting the characteristics of natural and artificial ecosystems.
Legend has it that a question arose among the citizens of Königsberg whether one could walk through the city crossing all the bridges only once.
There is water vapour in the air all the time. If the air becomes saturated with it, precipitation occurs.
The alternation of day and night is caused by the Earth’s rotation around its axis.
This video presents the consequences of the Earth’s overpopulation, the antecedents of the phenomenon and the population figures of our day.
Watch this video to find out what problems a metropolis has to face today.
The major edifices of ancient Rome had a significant influence on later European architecture.
How do attendants prompt seal pups to do what they are asked to? They are even willing to come to the shore for us! How can we teach them to do that?
