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A molcajete (Spanish: [molkaˈxete]; Mexican Spanish, from Nahuatl molcaxitl) and tejolote (from Nahuatl texolotl) are stone tools, the traditional Mexican version of the mortar and pestle, [1] [2] similar to the South American batan, used for grinding various food products.
Tridilosa: invented by civil engineer Heberto Castillo. Anti-graffiti coating (Deletum 3000): developed in the early 2000s at UNAM’s Applied Physics and Advanced Technology Centre in Querétaro Mexico. Earthquake Resistant Foundations: invented by engineer Manuel González Flores in 1945.
The timeline of wars has been split up in the following periods: List of wars: before 1000; List of wars: 1000–1499; List of wars: 1500–1799; List of wars: 1800–1899; List of wars: 1900–1944; List of wars: 1945–1989; List of wars: 1990–2002; List of wars: 2003–present
500 BC – The moldboard iron plough is invented in China; 500 BC – Row cultivation of crops using intensive hoeing to weed and conserve moisture practised in China; 300 BC – Efficient trace harness for plowing invented in China; 200 BC – Efficient collar harness for plowing invented in China; 100 BC – Rotary winnowing fan invented in China
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Monkeys are also common. A unique feature of ceremonial metate is the lack of human figures. Disembodied heads are the sole exception. While human figures become the main subject of the free standing sculptures, which depict nude females or male warriors with trophy heads and bound male captives, these do not seem to have been depicted on metate.
The game remained in print for a time even in the Netherlands, as the printer there was able to maintain a supply of paper. [116] Elizabeth Magie's second patent on The Landlord's Game expired in September, 1941, and it is believed that after the expiration, she was no longer promoted as an inventor of Monopoly . [ 117 ]
Crescograph – The crescograph, a device for measuring growth in plants, was invented in the early 20th century by the Bengali scientist Sir Jagadish Chandra Bose. [315] [316] Shearing interferometer – Invented by M.V.R.K. Murty, a type of Lateral Shearing Interferometer utilises a laser source for measuring refractive index. [317] [318]