1. The color of the egg yolk depends on the hen’s diet. A yellow egg yolk simply means that the chicken where it came from was fed with commercial poultry feeds rich in yellow pigments (which is usually the case).

2. Boxing has always been about fist fighting. Its alternative name, “pugilism,” evolved from the words pugnus, a Latin word for “fist”; and pyx, a Greek term which means “with the clenched fist.” The Sumerians left behind relief carvings suggesting that they engaged in a crude form of boxing as early as 3rd millennium BCE.

3. Depending on what you read, the first blackboard was created by either James Pillans in 1800 or George Baron in 1801. The former was a headmaster of the Old High School of Edinburgh, Scotland while the latter was a mathematics teacher from West Point. In order to illustrate their lessons in front of a large audience, both came up with a large writing board by putting several smaller erasable slates together.

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