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B-24 Liberator

The B-24 Liberator was an American heavy bomber aircraft, built in large numbers, that was used on every front during World War II.

Ancient Greek house

The average house in Ancient Greece had a rectangular, geometrical floor plan and two storeys.

Santa Maria (15th century)

Christopher Columbus' three-masted carrack, the Santa Maria was the flagship of his first, landmark voyage.

Namdaemun (Seoul, South Korea, 14th c.)

Designated as the first National Treasure of South Korea, the Namdaemun was one of the major gateways of Seoul's Medieval city walls.

Domestic electric light sources

This animation shows the characteristics of domestic light sources, from traditional light bulbs to LED lights.

Scale exercises

An interesting logical exercise: you have many weights that look the same, you have to find the only one that is different.

The electrical conduction system of the heart

The heart generates the electrical impulses necessary for its own operation. The graphic representation of the electrical activity of the heart is the...

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