2. Caffeine first entered the scientific canon in 1819
German chemist Friedlieb Ferdinand Runge was the first to identify the chemical, which, according to Today's Chemist At Work magazine, was isolated from rare coffee beans that were a gift from the writer Johann Wolfgang von Goethe. Also, there is a magazine called Today's Chemist At Work.
3. The three most popular drinks in the world all contain caffeine
Coffee, tea, and cola.
4. It works by blocking inhibiting brain juice and increasing dopamine
Adenosine is a chemical that accumulates in your brain over the course of the day and makes you tired. Caffeine so closely resembles adenosine that it blocks the adenosine receptors, keeping your brain from feeling fatigue. Plus, there's a kick of that all-important pleasure spiker known as dopamine. Both of these chemical reactions happen in the prefrontal cortex, which is generally associated with planning cognitive skills.