Wear one to your next cardiologist appointment or look awesome at the gym

Fill this Mathematical Musings notebook up with your most ingenious math models

conduct calculations

astronomical observations

Wear this shirt on late-night forays into the forest collecting data

Anatomical Heart Dark Matter Notebook 5x7 Wear one to your nextHearts will flutter with this bold and beautiful Anatomical Heart Dark Matter hardcover notebook. Featuring an illustration of an anatomical heart and black lettered medical text on a red blooded background, this black paged journal is perfect for taking anatomy notes, recording lab data, or working on this month's bullet journaling project. Get ready for a thrilling addition to our Dark Matter collection! We've taken some of our most loved notebook