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The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
The Earth is composed of several spherical layers.
The orbits of the 8 planets in our Solar System are elliptical.
Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.
The geographic coordinate system enables every location on the Earth to be exactly specified.
African villages adapt to the natural environment well and reflect of the culture of local tribes.
The International Space Station is a habitable satellite built with the cooperation of 16 countries.
Mechanical bell that functions by means of an electromagnet.
This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.
This animation demonstrates the structure and operation of hair dryers.
Before the emergence of motorised vehicles, letters and packages were delivered by horse-drawn carriages.
An average Egyptian dwelling consisted of regularly arranged rooms.
The 'wise man' originated in Africa and dispersed throughout most of the continents.
The Giza Necropolis is the only one of the Ancient wonders still intact.
The inner planets of the Solar System are terrestrial planets while the outer planets are gas giants.
Carved into a granite cliff, the sculptures of the Mount Rushmore National Memorial depict four great United States presidents.
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 (199 mph).
The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.
The apparent movement of the Sun is caused by the Earth's rotation around its axis.