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The color is usually very even, which makes it ideal for small garments or the lining of larger ones, though some large pieces can be made entirely from the fur. A single, full-length coat made from chinchilla fur may require as many as 150 pelts, as chinchillas are relatively small. [18]
Parkesine, the first member of the Celluloid class of compounds and considered the first man-made plastic, is patented by Alexander Parkes. [4] 1869: John Wesley Hyatt discovers a method to simplify the production of celluloid, making industrial production possible. 1872: PVC was accidentally synthesized in 1872 by German chemist Eugen Baumann ...
The family Chinchillidae is in the order Rodentia and consists of the chinchillas, the viscachas, and their fossil relatives. This family is restricted to southern and western South America, mostly living in mountainous regions of the Andes but one species living on plains. They are medium to large-sized rodents, weighing from 800 g (28 oz) to ...
Short-tailed chinchillas were first brought to the U.S. in the 1920s by a mining engineer named Mathias F. Chapman. Chapman loved chinchillas and received permission from the government of Chile to import 12 individuals of the species to the U.S. He made sure to allow the chinchillas to assimilate into their new environment.
A young wild Chilean chinchilla (2006) A domesticated chinchilla Chinchilla lanigera is smaller—wild animals have body lengths up to 260 mm (10 in)—has more rounded ears—45 mm (1.8 in) in length)—and a longer tail than C. chinchilla; its tail is usually about a third the size of its body—up to 130 mm (5.1 in) compared to 100 mm (3.9 in) in C. chinchilla.
1380: Madhava of Sangamagrama discovers the most precise estimate of π in the medieval world through his infinite series, a strict inequality with uncertainty 3e-13. 15th century: Parameshvara discovers a formula for the circumradius of a quadrilateral. [114] 1480: Madhava of Sangamagrama found pi and that it was infinite.
Image credits: Leifur311 In 2022, the Sahara saw unusual snowfall in its Algerian territory. However, that wasn't the first time we could see snow, as the phenomenon was also recorded in 2017 ...
1909 – Bakelite hard thermosetting plastic presented by Leo Baekeland; 1911 – Superconductivity discovered by Heike Kamerlingh Onnes; 1912 – Stainless steel invented by Harry Brearley; 1916 – Method for growing single crystals of metals invented by Jan Czochralski; 1919 – The merchant ship Fullagar has the first all welded hull.