Bats use ultrasound to navigate and hunt for prey.
Machines converting the energy of wind into useful forms of power were already in use in the Middle Ages.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h.
Before the emergence of motorised vehicles, letters and parcels were delivered by horse-drawn mail coaches.
The magnificent bath complex of the Roman Emperor was built in the 3rd century AD.
Darwin's legendary voyage aboard HMS Beagle played a crucial role in the development of the Theory of Evolution.
This animation introduces body parts on a male anatomical model.
Plants are capable of converting inorganic substances (carbon dioxide and water) into organic sugar.
This creative animation contains several 3D objects for colouring.
The layers of different types of forests may vary.
The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.
Chameleons are reptiles with an ability to change their colours.
This animation introduces the studies of astronomers and physicists whose works fundamentally changed our view of the universe.
Amino acids are the monomers of proteins.
These Palaeolithic statuettes probably symbolise fertility and prosperity.
Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.
According to Homer’s epic, Odysseus’ Stratagem caused the loss of Troy.
Marie Curie, the only person to win the Nobel Prize in two different sciences, is probably the most famous woman in the history of science.
Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.