Geophysics to every area of the Earth sciences. To provide a clearer idea of what constitutes geophysics, this section describes phenomena that are studied in physics and how they relate to the Earth and its surroundings. The gravitational pull of the Moon and Sun give rise to two high tides and two low tides every lunar day, or every 24 hours and 50 minutes. Therefore, there is a gap of 12 hours and 25 minutes between every high tide and between every low tide. Gravitational forces make rocks press down on deeper rocks, increasing their density as the depth increases. Measurements
Wall of the Sun and Wall of the Moon Wall of the Sun and Wall of the Moon The Wall of the Sun and Wall of the Moon are a pair of murals made of ceramics and designed by the Catalan artist Joan Miró for the UNESCO building in Paris. The works were carried out by the ceramicist Josep Llorens Artigas in 1955. Initially, the walls were installed on the Place de Fontenoy in Paris, but afterwards were enclosed in a building that was constructed in order to protect them from damage caused by acid rain. Joan Miró and Josep Llorens Artigas met in 1910 at the school of