An exercise about the regular hexahedron built from unit cubes to help deepen your...
An entertaining game about different views of spatial objects.
A cuboid is a polyhedron with six rectangular faces.
Schooners, first built in the Netherlands in the 17th century, were mainly used as...
HMS Dreadnought revolutionised battleship-building in the 20th century.
Spanish conquerors owed their success to their armour and firearms.
The Greek fleet owed their success to their good tactics and their fast and easily...
Dicotyledons have two embryonic leaves (cotyledons), while monototyledons have only one.
English sailing ships were among the best ships in the 17th-19th centuries.
This animation demonstrates the five regular three-dimensional (or Platonic) solids, the...
Solid, white substance, a constituent of vegetable oils and animal fats.
Electric current can be generated by rotating an armature loop in a magnetic field.
Concave and convex lenses are used for the correction of shortsightedness and farsightedness.
The legendary M61 class locomotives of the Hungarian State Railways were manufactured by...
This animation demonstrates the mechanism and operation of record players.
This animation explains the technology of shale gas extraction.
The outcome of one of the greatest battles in the history of the ancient East (fought by...
Electrochemical processes in a lead-acid battery produce electric current.
Learn the concept of colours, numbers, letters and shapes while playing
One of the most common types of flatworms.