The secret of stutter

That had in common the Emperor Tiberius Claudius. Churchill. Newton and Borges? The four were stutter, speech dysfunction that affects 800,000 people in Spain.

A study by Professor Caries Escera. Department of Psychiatry and Psychobiology of the Autonomous University of Barcelona, has come to the conclusion that the stutter are abnormal representation of speech sounds.
When you hear a phoneme, ie sounds to distinguish the words of one language, the brain response is anomalous.

To produce a sound is necessary to have a good model that allows articulate the right way and people do not stutter and why jam.

Why it says "cool"?

Popularize in the eighties and nineties, cool became a wildcard word to mean one thing or one person were amusing, amazing, fantastic and attractive.
Recently, word has been added to a certain burden to include it in the pejorative term "Go for cool," is said about who is or who falsely claims to money and fame.

But cool is a very old word that originally meant the Interjection ay. Thus, it had meaning of regret or threat: Guay Me!, Instead of Woe to me!; Guay or if you leave me!, Instead Woe to you if I leave!

Its use is already reflected in texts of the Middle Ages and can find the word without any effort at La Celestina (1499), by Francisco de Rojas.
Guay purchased the current meaning in the twentieth century to coincide phonetically with English voice gay (Funny, brilliant).