The Northern white-breasted hedgehog rolls into a ball to protect itself.
The V-1 flying bomb was an early pulse-jet-powered cruise missile developed in Nazi Germany and deployed in WWII.
A transformer is a device used for converting the voltage of electric current.
Biogas can be produced from organic material (manure, plant waste, organic waste) using bacteria. Biogas is a mixture of methane and carbon dioxide; burning...
This animation demonstrates the design and operation of a traditional cinema projector.
Tardigrades can survive in extreme environments, they can even stay alive in outer space.
A sailing vessel with characteristic lugsails used for both military and trade purposes.
This animation demonstrates the process of star development for average and massive stars.
Pollution is the negative effect of human activity on the natural environment.
The Kepler space telescope was launched by NASA to discover Earth-like planets orbiting other stars
A geisha is a traditional Japanese entertainer whose skills include performing classical music and dance.
The Vought F4U Corsair radial-engined naval fighter was one of the most prominent American aircraft of the Second World War.
The dodo is an extinct species of birds that used to be native to the island of Mauritius. It has become the symbol of extinction.
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
The Tesla Model S is one of the first commercially available electric cars.
It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.
The Rosetta Stone helped to solve the mystery of hieroglyphics.
Learning about the geographic location, capitals and flags of American countries through exercises in three levels of difficulty.
Numerous legendary empires were built (and destroyed) in the course of history.
This animation helps you learn the basics of healthy eating.