A Romanesque style Benedictine church with a special gateway, built in the 13th century in Hungary.
The most popular European-made transport aircraft before World War II.
This animation compares a modern living room and a typical bourgeois salon.
Automobiles have evolved a lot since the late 19th century.
Giant sequoias are the world's largest living organisms by mass.
The California Gold Rush started in 1848, near San Francisco.
This animation demonstrates the main sources of air pollution: Agricultural, industrial and urban air pollution.
A floatplane (sometimes called hydroplane) is an aircraft capable of taking off not only dry land, but water too.
An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.
This animation demonstrates birds' bones and eggs through the example of the common blackbird.
This animation demonstrates how electric steam irons work.
This animation presents animals commonly kept as livestock and the primal cuts of their meat.
A Zeppelin is a type of controllable, rigid airship.
American soldiers fought in almost all major theaters of World War II.
Ancient Persian monarchs were famous for the size of their empire and their wealth.
Small farms usually located near the border of rural towns, inhabited by peasants.
Caliphs, considered successors of the Prophet Muhammad, were the most important religious leaders of Islam.
Simple harmonic motion can be considered to be the one-dimensional projection of uniform circular motion.
A force can be measured by measuring the twisting of the torsion wire in a torsion balance.
Large, extinct species of cats named after the shape of their large canine teeth.