The American inventor presented his invention revolutionising telecommunication at New York University in 1837.
Mercenaries of the ancient Roman army were well-trained and well equipped with the most up-to-date weapons.
The device that transmits human voice as electrical signals was invented by Bell in 1876.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
The German engineer Rudolf Diesel patented the diesel engine in 1893.
This bizarre-looking fish uses its bioluminescent lure to catch its prey. The animation explains how it works.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.
This animation shows the symptoms and treatment of secretory otitis media.
Chess games can help to develop logic skills.
Studying Ceres and Vesta will help us learn more about the early history of the Solar System and how rocky planets are formed.
Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.
Stratovolcanoes consist of layers of volcanic ash, debris and lava.
Hotspots are areas of the Earth´s crust where magma often rises to the surface and causes volcanic activity.
The Earth’s magnetic North and South poles are located near the geographic North and South poles.
A spectacular demonstration of algebraic expressions.
The American electrical engineer Edison invented the incandescent light bulb in 1879, which changed our everyday life.
The Giza Necropolis is the only one of the Ancient wonders still intact.
Matter is made up by quarks and leptons, while interactions are carried by bosons.
The ´Temple of all gods´ was built during the reign of the Roman Emperor Hadrian.
Formula 1 is the highest class and most popular type of motor racing.