Shaving Myth?

“Shaving your hair makes it thicker.”

False. Old wives’ tale.

Regrown hair is not thicker, coarser, or darker, it just appears so because it is no longer tapered. Consider, if shaving caused all those things, wouldn’t hair continue to grow thicker until individual sprouting follicles looked like hedgehog-like keratin spikes?

See other: Mythconceptions?


Bald All Over

No more body hair
3.3 million years ago

Humans are the nearly-hairless apes. No one knows why, but it happened 3-4 million years ago. That’s when pubic lice evolved, which could only infest us once our other body hair was gone. Exposed to the Sun, our skin darkened. From then on all our ancestors were black, until some humans left the tropics.

See other: What Makes Humans Human?

11/vi mmxv

Salvador Dali broke his jaw while putting his fist in his mouth as a party trick. He was trying to impress the woman who would later become his wife.

Odontophobia is the fear of teeth.

Queen Victoria wore a bridal veil made from human hair.

According to USA Today, North Koreans must abide by one of 28 approved haircuts. Unmarried women must have short hair, but married woman have many more options. The hair of young men should be less than 2 inches long, older men can go as long as 2¾.

Since 1968 onwards, more Americans have died from gunfire on home soil than in all the wars in United States history.

See other: Quite Interesting Facts

5/iii mmxiv

Duelling is legal in Paraguay as long as both parties are registered blood donors.

In 2008 a lock of Jane Austen’s hair was sold at auction for £5,640.

Women are 37% more likely to go to a psychiatrist than men are.

Istanbul, Turkey, is the only city in the world located on two continents.

During his first term as U.S. President, Barack Obama introduced a bill which allowed a person to sue if he was unemployed and didn’t get a job he was interviewed for because he thought he wasn’t hired because he was unemployed.

See other: Quite Interesting Facts

I Corinthians 11:5-6

5 But every woman who prays or prophesies with her head uncovered dishonours her head—it is the same as having her head shaved.

6 For if a woman does not cover her head, she might as well have her hair cut off; but if it is a disgrace for a woman to have her hair cut off or her head shaved, then she should cover her head.

See other: Often Ignored Bible Verses

Ramsey and The Pigeonhole Principle

Ramsey theory, named after the British mathematician and philosopher Frank P. Ramsey, is a branch of mathematics that studies the conditions under which order must appear. Problems in Ramsey theory typically ask a question of the form: ‘how many elements of some structure must there be to guarantee that a particular property will hold?’

Illustration of The Pigeonhole Principle

Suppose, for example, that we know that n pigeons have been housed in m pigeonholes. How big must n be before we can be sure that at least one pigeonhole houses at least two pigeons? The answer is the pigeonhole principle: if n > m, then at least one pigeonhole will have at least two pigeons in it.

The photograph on the right shows a number of pigeons in holes. Here there are n = 10 pigeons in m = 9 holes, so by the pigeonhole principle, at least one hole has more than one pigeon: in this case, both of the top corner holes contain two pigeons. The principle says nothing about which holes are empty: for n = 10 pigeons in m = 9 holes, it simply says that at least one hole here will be over-full; in this case, the bottom-left hole is empty. Ramsey’s theory generalizes this principle as explained below.

A typical result in Ramsey theory starts with some mathematical structure that is then cut into pieces. How big must the original structure be in order to ensure that at least one of the pieces has a given interesting property?

For example, consider a complete graph of order n; that is, there are n vertices and each vertex is connected to every other vertex by an edge. A complete graph of order 3 is called a triangle. Now colour every edge red or blue. How large must n be in order to ensure that there is either a blue triangle or a red triangle? It turns out that the answer is 6.

Another way to express this result is as follows: at any party with at least six people, there are three people who are all either mutual acquaintances (each one knows the other two) or mutual strangers (each one does not know either of the other two).

A comic result of the pigeonhole principle is the “proof” that in the city of New York (or any other city with a population over a million) at least two people have the same number of hairs on their head. The reasoning is as follows: an average human being has about 150.000 hairs on the scalp; it is reasonable to assume that no human being has more than 1.000.000 hairs on the scalp. Over a million people live in New York. The population of n people (exceeding a million) has to be arranged in m (1.000.000 or less) collections; one collection is possible for each number of hairs on the scalp. Because n population > m different numbers of hairs on the scalp, there are at least two people in one of these collections – at least two people with the same number of hairs.

See other: Admin’s Choice Posts