What made football referees red and yellow cards? Detailed answer

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What made football referees red and yellow cards? Detailed answer

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Did you know?

What made football referees red and yellow cards?

Until the end of the 1960s, football referees did not have cards, and they simply recorded warnings in a notebook.

Analyzing some scandals in international matches related to the language barrier between referees and players, the head of the refereeing corps of the World Cup, Ken Aston, wanted to make the system of punishments more visible. The decision was born to him when he was driving a car and stopped at a traffic light. Upon arrival home, he shared the idea with his wife, who immediately visualized it by cutting out red and yellow cards from colored cardboard.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What is rubber?

Rubber has been around for as long as nature itself. The fossilized remains of rubber trees that have been found are almost 3 million years old! Raw rubber balls found among the ruins of the Inca and Mayan civilizations in Central and South America are at least 900 years old.

During his second voyage to the Americas, Columbus saw that the inhabitants of Haiti were playing with a ball made from "tree sap". But even before that, the natives of Southeast Asia knew about rubber (rubber), made from the "sap" of trees, with which they coated their baskets and jugs to make them waterproof!

Rubber is found in 400 different trees and shrubs. But the amount of rubber in different plants is not the same, therefore it is unprofitable to obtain rubber from such plants as, for example, dandelion, spurge, wormwood.

Rubber is a sticky, elastic solid that is made from a whitish liquid called "latex" that is different from tree sap. Latex is found in the bark, roots, stem, branches, leaves, and fruits of plants and trees. But most of all it is under the bark of the branches and trunk of rubber plants.

Latex consists of the smallest particles of liquid, solid particles, and other impurities. Only about 33% of latex is rubber, the rest is water. The rubber particles in latex are brought together to form a rubber ball.

Rubber plants grow best no further than 10 degrees from the equator to the north and south, so the 1300 km wide strip on both sides of the equator is known as the "rubber belt". The fact is that rubber plants require a very warm, humid climate and fertile soil. Most of the rubber comes from Hevea brasiliensis. By its name, it can be assumed that the tree was first discovered in Brazil. At present, almost 96% of the world production of natural rubber comes from plantations of these trees, they are grown in many countries of the rubber belt.

Among Europeans, the first to manufacture goods from rubber were, apparently, the French, who began to manufacture suspenders and garters around 1800.

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