“Coffee and the Brain: Attention, Make, React, Threat” is a featured article in the special Coffee, and Tea issue (volume 26, number 4) of the Annals of Improbable Research. It gurgles into the seemingly eternal quest to understand how coffee affects what the drinker thinks and feels, and does not think or feel.
Read the article free, online. If you like it, make yourself a cup of coffee, spill a little for luck, and then maybe subscribe to the magazine.
