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Candles have been used for lighting since ancient times.
RMS Titanic was the largest passenger ship at the beginning of the 20th century.
According to Homer’s epic, Odysseus’ Stratagem caused the loss of Troy.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
The first supersonic passenger airliner entered service in 1976.
Commercial maritime routes of container ships form a global network.
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.
One of the directors of the circular, open-air Renaissance theater in London was William Shakespeare.
An average Egyptian dwelling consisted of regularly arranged rooms.
This animation demonstrates Sir Isaac Newton's three laws of motion that laid the foundation for classical mechanics.
The Giza Necropolis is the only one of the Ancient wonders still intact.
The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
Medieval townhouses were built from stone or brick and were several stories high.
The geographic coordinate system enables every location on the Earth to be exactly specified.
The B-24 Liberator was an American heavy bomber aircraft, built in large numbers, that was used on every front during World War II.
This animation shows the symptoms and treatment of secretory otitis media.
Life magazine picked Gutenberg's invention of mechanical movable type printing as the most important event of the second millennium.
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.