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Clays develop plasticity when wet but can be hardened through firing. Clay is the longest-known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of the earliest pottery shards have been dated to around 14,000 BCE, and clay tablets were the first known writing medium.
Persone. Andrew Dice Clay – attore e musicista statunitense. Bryan Clay – atleta statunitense. Cassius Clay, meglio noto come Muhammad Ali – pugile statunitense. Charles Clay – giocatore di football americano statunitense. Clement Comer Clay – politico statunitense. Craig Clay – calciatore inglese. Henry Clay – politico statunitense.
Muhammad Ali, nato Cassius Marcellus Clay Jr. (Louisville, 17 gennaio 1942 – Scottsdale, 3 giugno 2016), è stato un pugile statunitense. È considerato uno dei migliori pesi massimi di tutti i tempi.
Clay minerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al 2 Si 2 O 5 4), sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces.
Il giorno dopo la sua prima cintura mondiale, sottratta a Sonny Liston il 25 febbraio 1964, ha rinunciato al suo nome da schiavo, convertendosi alla Nation of Islam. E perché la storia di Cassius Clay diventi la leggenda di Muhammad Ali, ne manca un terzo: The Greatest.
Clay is a fine-grained silicate mineral made when rocks break down. Wet clay is soft and can be shaped to make pottery, bricks and other things. When it is shaped and then fired in a kiln to make it hard, it becomes pottery. Clay often contains some water because the water molecules stick to the tiny grains.
Clay, soil particles the diameters of which are less than 0.005 millimeter; also a rock that is composed essentially of clay particles. Rock in this sense includes soils, ceramic clays, clay shales, mudstones, glacial clays, and deep-sea clays.
