The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.
The Earth is a rocky planet with a solid crust and oxygen in its atmosphere.
Certain mushrooms are poisonous and can be fatal for humans when consumed, while others are edible and used widely in cooking.
Human blood consists of blood cells and plasma.
The army of Alexander the Great successfully deployed siege towers in its attacks against fortifications.
The huge dam built on the Colorado river in the US was named after a former American President.
The large intestine is the last section of our digestive track.
Cannons also appeared in naval warfare.
The seminomadic lifestyle of the Bedouin adapted to the climatic and environmental conditions of the desert.
In the Tudor Era around 200 buildings were built on the bridge across the River Thames.
Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.
The position and acceleration of the head is detected by the inner ear.
A series of fortifications built to prevent incursions from northern nomadic groups.
Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.
Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.
This animation demonstrates the structure and operation of electron microscopes.
Nuclear fusion will serve as an environmentally friendly and practically unlimited source of energy.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
One of the most modern means of transport is the Maglev, capable of travelling at speeds of over 400 km/h.