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Equations that Changed the World Hardcover Notebook - Dot Grid

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This deep blue and burnt orange notebook is inspired by the equations that have changed the world. The Pythagorean Theorem, five regular solids, the Theory of Proportions, sphericity of the Earth, are just a few among many scientific and mathematical discoveries credited to the early Greek philosopher Pythagoras. Channel his innovative spirit as you take notes in this hardcover journal from your physics class, graph your findings or keep track of your data.

Carbon Neutral Shipping & Operations
100% Recycled Paper
Composable Packaging

The textured covers of these notebooks have the feel of old textbooks, and with advanced lay-flat pages, they want to fall open, like a well-loved library book. Go ahead and see for yourself – these are the notebooks your most brilliant ideas have been waiting for.

The Hypothesis series is built with high-quality 100% recycled paper and printed with soy inks, leaving a light footprint. Be inspired to ask the right questions, connect the dots (even when they’re really far apart), and keep pushing humanity forward, so that tomorrow is always brighter than today.

178 x 229 mm (7" x 9")
Page Count
192 pages (96 sheets)
Paper Type 5mm Dot Grid
Paper Weight 81 gsm
Binding Lay-flat Hardcover
Paper Composition 100% recycled
Printing Soy-based ink
Origin Designed in Oregon
Paper milled in Japan
Assembled responsibly in China


For more information on our paper, see the blog.

Shipping is available to Europe & the UK!
Within the EU

Orders €75+ ship for free!
Flat Rate shipping €9.95 on orders less than €75

To the UK + EFTA + Rest of Europe

Orders €100+ ship for free!
Flat Rate shipping €15.95 on orders less than €100
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* Delivery to zip codes that UPS considers to be "Remote" are charged the UPS Extended Service area fee of €30 in addition to the standard shipping rates.

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Shipping by GLS & UPS 1-5 days

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On EU orders over €75

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within 30 days of purchase

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Customer Reviews
4.8 Based on 12 Reviews
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Victor V.
United States

In my not-so-humble opinion,

These are outstanding notepads. The problem I have with them is that the tiny dots are too faint to be visible in locations that are not well lighted. I like to draw electronic schematics and the dots will not serve their purpose. (I use 1/4" graph paper.) I am not asking for a refund because I think they are a beautiful work of art and I will give them to persons who will appreciate them.

Mabel R.
United States

The Perfect Notebook

I love these notebooks so much! Perfect size. The dot grid is so light they’re basically unlined. They really do lie open on their own without flopping back closed. The hardcover makes them super-durable. I buy a new one for every project I start. Plus such fun graphics!

Adam S.
United States

this review

The best part of this journal was the quality of the quality; the worst part was having to write this infernal review.

Ada W.
United States

Awesome Notebook!

I first saw these notebooks at a science conference in Seattle and did not buy one then- and what a mistake that was! I recently ordered this notebook to journal in and it has so far surpassed my expectations. The cover is beautiful and interesting, and the pages are very good quality. My pen does not bleed through at all. Overall a very nice notebook that I would highly recommend!

Gustavo M.
United States

Beautifully designed and made

This was the first Cognitive Surplus notebook that catched my eye and I made no mistake ordering it. It is beautifully designed and made. I'm sure I will enjoy it for a long time. Highly recommended.

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