We make sustainable stationery and lifestyle goods to celebrate science.
New Arrivals
Now Entering Dark Mode
Black Paper Notebooks
Find notebooks with black pages and a range of compatible pens for black paper.
Selected Specimens
Supernova Gel Pens (Pack of 10)$ 15.95
Take beautiful notes or illustrate illuminated scenes in the dark. These gel pens are specially formulated to work with the Dark Matter notebooks – they write in vibrant color o...
Linguistics Dark Analysis A5 Softcover Notebook$ 19.95
Immerse yourself in the world of language - Adorned with Chinese characters, Arabic script, Egyptian hieroglyphs, Hebrew, Phoenician, Greek, and more, this notebook is a unique ...
Ready to Launch Dark Matter Notebook$ 29.95
Lights illuminate the Artemis 1 rocket as we prepare to set foot on the moon once more. Each cover in the Dark Matter series celebrates the beauty found in darkness and the sce...
Shop in person!
Come visit a Cognitive Surplus retail store.
Redmond, OR
Portland, OR
Providence, RI
Peer Reviews
Let customers speak for us
Nicely made. Fountain Pen Friendly
I bought this for my teaching notes in Medical Anatomy. Nicely made The binding lays flat. The paper is smooth and off white. Provides nice contrast for reading and using colored inks. Recommended.
DPC
Quality Product
I love their stuff. The dark paper journals handle gel pens with absolutely no problem. I got to try the dark matter and the other one. Both may seem like their pages are on the thin side but I've had no issues journaling with Languo and gelly roll pens. I would buy so much more if I could afford it. Their washi tape is also as cool in person and very sticky. Also, customer service is awesome.
Ashley L.
Great washi tape
I think this washi tape is so cute, great quality and fast shipping
Sallie M.
Great Washi
I love this Washi tape! It’s so cute and very nice quality. I’d buy it again
Sallie M.
Stainless Steel Straw Lid
Terese J.
Garden Friends Notepads
Dan D.
Love the towel!
The great thing about this towel is it reminds me to wash it before it is full of real germs!
Nicole J.
Ready for anything
Life has been so unpredictable - what a relief it is to have the perfect card for whatever gets thrown my way next!
Barbara C.
Good quality and the perfect alternative to some cheesy hallmark card
Sarah
Night Sky Star Whiskey Glass
This glass was a birthday gift for my nephew and he thought it was very cool since he is a stargazer.Imagine he enjoyed some whiskey on the rocks. He loves the Raiders also , so I got him a pair of Raider socks,rolled them up in the glass with a note that said socks on the rocks.
Customer
Absolutely fantastic! Very thick paper so it’s well made and obviously custom. It has a lovely texture and not just the plain ole’ printed on paper. It’s not a large size so I recommend for smaller packages. Worth every penny!
Sarah
Great bottles - love the design and the way they work!
Love my bottles - I have 2 of them. They keep my water cold all day, even without adding extra ice to the cold water. So far, in spite of the daily use, no issue with the graphics coming off either! Highly recommend!
D.
Perfect!
We gave this glass to our son, who is studying math in college, and he loved it! His grin was so wide as he looked at each equation.
Marian W.
Great White Elephant Gifts
I bought several mystery boxes to find some unique gifts, and I was not disappointed. It was like Christmas opening the box. Thank you!
Amanda C.
Mushroom tote
I'm so happy with my mushroom tote! It is the perfect size to keep in the car for running errands, the grocery store or even carrying your laptop! The mushroom are so cute as well!
Susan B.
