Lunar eclipses occur when the Moon passes through the shadow cone of Earth
The theatre that has a distinctive shape and excellent acoustics was situated at the side of the Acropolis in Athens.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.
Cannons also appeared in naval warfare.
The seminomadic lifestyle of the Bedouin adapted to the climatic and environmental conditions of the desert.
The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.
Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.
In the Tudor Era around 200 buildings were built on the bridge across the River Thames.
The Parisian prison became legendary after the Revolution of 1789.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The large intestine is the last section of our digestive track.
A series of fortifications built to prevent incursions from northern nomadic groups.
Nuclear fusion will serve as an environmentally friendly and practically unlimited source of energy.
The army of Alexander the Great successfully deployed siege towers in its attacks against fortifications.
The position and acceleration of the head is detected by the inner ear.
One of the most modern means of transport is the Maglev, capable of travelling at speeds of over 400 km/h.
The American inventor presented his invention revolutionising telecommunication at New York University in 1837.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.