Standing bodies of water can form in depressions on the surface by both endogenic and exogenic forces, as well as by human activity.
The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.
The first section of the gastrointestinal tract comprises the oral cavity, the pharynx and the esophagus.
Massive accelerating or orbiting bodies cause ripples in spacetime. These are called gravitational waves.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
The fortress-like palace was built by Roman Emperor Diocletian on the coast near his hometown.
This animation presents the main types of leaves and the differences between monocot and dicot leaves.
As a result of the revolutionary advances in the Neolithic, settling human communities established the first lasting settlements.
This animation explains the most important characteristics of waves through sound waves.
Physical properties, as well as the flora and fauna of the ocean change with depth.
In mountainous areas the climate, soil properties, the flora and fauna change depending on elevation.
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.
These organs are vital for the survival and development of plants.
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
The bacterial disease known as the bubonic plague is one of the deadliest infectious diseases in the history of mankind.
The building commissioned by Pompey the Great was the first permanent theater in Ancient Rome.
Napoleon I, who crowned himself emperor, was one of the most outstanding military commanders in history.
These great scientists had a tremendous impact on the advancement in physics.
An earthquake is one of the most devastating natural phenomena.