5. According to legend, we owe a great debt to an Ethiopian goat herder named Kaldi... or a Yemeni dervish named Omar
The prevailing myth of coffee's origin states that the bean was discovered after Kaldi, a herder, noticed his goats dancing around while high on coffee berries. The plot line splinters from there, but the most common version states that he then brought the beans to an Islamic monk who objected to them on religious grounds and threw them in a fire... where they were roasted and ultimately used for the first very coarsely-ground cup of Joe.
The second legend involves a Yemeni dervish named Omar who had been exiled from the city of Mocha (this city gives one variety of bean its name) and found a coffee bush while starving in the desert. He roasted the beans in water, drank it, and then was so revitalized he began spreading the gospel of caffeine as a miracle cure.
6. Caffeine takes 20-30 minutes to go into effect
To maximize the benefits, take a quick nap immediately after consumption in order to lower your adenosine count and give that caffeine more receptors to hook up to. The half-life of the drug is four to six hours, and most often your system is relatively clear after 12 hours.
7. It's not just in coffee beans or tea leaves
You can also find caffeine in cola nuts (used in... colas), cacao beans, and the guarana fruit.