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Possible traces of water and life are sought on Mars.
Domesticated animals and crops originate from various parts of the world.
The Earth is composed of several spherical layers.
Learning about the geographic location, capitals and flags of the world´s countries through...
The International Space Station is a habitable satellite built with the cooperation of 16 countries.
The orbits of the 8 planets in our Solar System are elliptical.
Neptune is the outermost planet of the Solar System, the smallest of the gas giants.
The diameter of the Sun is about 109 times that of the Earth. Most of its mass consists of hydrogen.