The V-1 flying bomb was an early pulse-jet-powered cruise missile developed in Nazi Germany and deployed in WWII.
The Northern white-breasted hedgehog rolls into a ball to protect itself.
Polynesians traveled huge distances with their specially designed boats.
The animation demonstrates the most important types of feathers and their fine structure.
Geckos can walk on walls or even ceilings. The 3D scene explains this ability.
This animation demonstrates the design and operation of a traditional cinema projector.
Highly committed Japanese soldiers fought primarily at the Asian and Pacific theaters of the Second World War.
Larvae of this type of mayflies spend the first three years of their lives in water, their adult lives last for only one day which they use for mating.
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...
A sailing vessel with characteristic lugsails used for both military and trade purposes.
Tardigrades can survive in extreme environments, they can even stay alive in outer space.
As opposed to opencast mines, in underground mines the layers covering coal are not removed, coal is extracted from mine shafts.
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the ancestor of birds.
The legendary ruler and military leader, Alexander the Great, established a vast empire.
A blood clot that forms in the deep veins of the lower limbs can cause a fatal pulmonary embolism if they enter the lungs.
A string quartet consists of four string players, it appeared in the late 18th century.
Learning about the geographic location, capitals and flags of African countries through exercises in three levels of difficulty.
Learning about the geographic location, capitals and flags of Asian countries through exercises with three levels of difficulty.
Learning about the geographic location, capitals and flags of European countries through exercises in three levels of difficulty.