The submarine designed by the Spanish inventor Narcís Monturiol was a pioneering work in the history of underwater navigation.
Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.
Keeps were typical buildings in the Middle Ages, also built independently from castles.
Concave and convex lenses are used for the correction of short-sightedness and far-sightedness.
The Apache attack helicopter, named after an American Indian tribe, was developed for the United States Army.
English sailing ships were among the best ships in the 17th-19th centuries.
Entertaining and spectacular animation to practise orientation in space.
The arms are moved by flexor and extensor muscles.
Static warfare was one of the characteristics of WWI
Spanish conquerors owed their success to their armour and firearms.
The German liquid-propellant rocket, developed during WWII, was the first known man-made object to reach space.
The animation presents the main air, water and land routes and transport hubs.
The ´Flying Fortress´ was developed for the United States Army Air Force by Boeing
Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.
Spitfire was a legendary British single-seat military aircraft used in World War II.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
A mobile, nuclear-capable ballistic missile developed at the end of the Cold War.
The two main parts of the central nervous system, the brain and the spinal cord are protected by the skull and the spinal column.
Bones of the lower limbs are connected to the trunk by the pelvis.
The fearsome looking Aztec warriors could not stop the Spanish conquistadors with their primitive weapons.