The perfect gift for the scientist: the pi notebook. Yes, THAT pi. For you nonscientists (or math enthusiasts), Openmathref defines pi as "is the circumference of any circle, divided by its diameter. Nobody knows its exact value, because no matter how many digits you calculate it to, the number never ends." This notebook, though, is the first 50 thousand digits of pi... miniaturized to make the lines of this blank journal. The sleek matte black cover is minimalist and discreet. The 6" x 9" size is perfect to throw in your bag and it's light enough so it won't weigh you down.