This effective strategy was based on the fast and synchronised attack of different branches of the army.
Several analogous types of eyes have developed independently through convergent evolution.
The American Civil War was fought between the Confederacy and the Union.
Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus uses a disc.
A type of sugar found in mammalian milk.
The medieval bell tower of the Cathedral of Pisa is the most famous leaning tower of the world.
The warship having several rows of oars was the typical warship of the Hellenistic era.
The legendary M61 class locomotives of the Hungarian State Railways were manufactured by Nohab.
The German engineer Otto Lilienthal was the first person to make successful flights with a glider designed by himself.
This animation demonstrates the mechanism and operation of record players.
An air conditioner cools the air inside by drawing heat away and releasing it outside.
Nuclear propulsion was first used by the US Navy for powering submarines in the mid-20th century.
The ancestors of Arachnida and Crustacea belonged to the class Trilobita.
Long-necked herbivorous dinosaur with a robust body.
Trolleybuses and trams are environment-friendly means of public transport
Articulated lorries play an important role in road transport.
Entertaining and spectacular animation to practise orientation in space.
This animation demonstrates how an escalator works.
The building material of the cell walls and fibres of plants.
Enzymes are protein molecules catalysing biochemical reactions. Their activity can be regulated.