There is a great article about caffeine called 14 Surprising Facts About Caffeine, Explained by Scientists. Scientists/Lab Technicians are said to drink the most coffee.
In their graphics, they show what the caffeine molecule formula looks like, what caffeine looks like under an electron microscope (very colorful!), how coffee affects your brain, the difference of what beer vs. coffee does, and other affects on your body.
There is also an interesting graphic of how a spider spins his web on various substances along with coffee.