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In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
This exciting and colourful game is designed to develop spatial perception. You can check your solutions using isometric views.
Rotating a geometric shape around a line within its geometric plane as an axis results in a solid of revolution.
Olfactory receptors produce electric signals when stimulated by odours.
Wind, as an external force, plays an important role in shaping deserts.
The Great ocean conveyor is a planet-wide system of ocean currents, which has a great influence on the Earth´s climate.
Taste receptors convert chemical stimuli into electric signals.
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
A widespread snail species, also popular as food.
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
The Wright Flyer was the first successful powered, heavier-than-air aircraft, designed and built by the Wright brothers.
This physicist-inventor and electrical engineer who mainly dealt with electrotechnics was undoubtedly one of the most brilliant figures of the second...
The life cycle of vertebrates starts with the production of the reproductive cells of an individual and ends with the production of the reproductive cells...
The building commissioned by Pompey the Great was the first permanent theatre in Ancient Rome.
We can travel on dual carriageways on the motorway.
Majestic even in its ruins, this city was the largest and most populous settlement in the pre-Columbian Americas.
This animation presents some interesting facts in the field of astronomy.
This animation demonstrates the anatomy of spiders through the example of a common European species.
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and heterotrophically.