Christopher Columbus' three-masted carrack, the Santa Maria was the flagship of his first, landmark voyage.
The atomic bomb is one of the most destructive weapons in human history.
Wealthy citizens in ancient Rome owned large houses with varied layouts of several rooms.
Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.
Eukaryotic cells contain a number of organelles.
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.
RMS Titanic was the largest passenger ship at the beginning of the 20th century.
One of the best known buildings in the world, this is the residence and office of the President of the United States.
The Rutherford Experiment proved the existence of positively charged atomic nuclei. The results led to the elaboration of a new atomic model.
Learning about the geographic location, capitals and flags of the world´s countries through exercises in three levels of difficulty.
The Internet allows us to send data quickly to large distances.
Candles have been used for lighting since ancient times.
A type of steam locomotives used by British Railways were manufactured in the 1950s.
This animations demonstrates the exterior and interior construction of cars, as well as their operation.
Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.
Commercial maritime routes of container ships form a global network.
The ancient city of Babylon was built on the banks of the Euphrates River in Mesopotamia.
River locks make rivers with great level differences safe for boating.
The apparent movement of the Sun is caused by the Earth's rotation around its axis.