What Caffeine Actually Does to Your Brain

What Caffeine Actually Does to Your Brain: "We've covered all kinds of caffeine 'hacks' here at Lifehacker, from taking 'caffeine naps' to getting 'optimally wired.' And, of course, we're obsessed with the perfect cup of coffee. But when it comes to why so many of us love our coffee, tea, soda, or energy drink fixes, and what they actually do to our busy brains, we've never really dug in."