Dirty Scientist
Model wearing the notebook-inspired Darwin I Think 1837 tee
Black tee, frontI Think / 1837 print
I Think / 1837 print artwork, close up
Black tee, back

Biology · Edition 01

I Think / 1837

Charles Darwin
£38
Coming soon · in final sampling
£5.50 UK tracked delivery. Printed to order in Blackburn, UK, and dispatched within 5 working days.
Colour Black
Black
Size

Relaxed unisex fit. Between sizes? Go by how much room you want through the chest.

  • 14-day returns. Change your mind and send it back for a refund.
  • Faulty or misprinted? Full refund or reprint, free.
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The story

In 1837 Darwin sketched a branching diagram and wrote “I think” above it: a raw idea, before it became a theory that changed biology.

More on Charles Darwin and what’s in the print ↓

Fabric & fit

AS Colour Classic Tee 5026. 220gsm, 100% combed cotton. Relaxed unisex fit: roomy through the body without being oversized.

cmSMLXL2XL3XL
Half chest475256.5616468
Body length707477.5818487

Garment measurements, in centimetres. Lay a tee you like flat and compare. The model photos are concept styling on an earlier blank; photos of the final tee are coming.

Delivery & returns

£5.50 UK tracked delivery per order, up to 6 tees. Printed to order in Blackburn, UK, and dispatched within 5 working days. We email your tracking number when it ships.

You have 14 days from delivery to change your mind. Read the full policy.

Behind the print

Charles Darwin

Naturalist · 1809–1882

The scientist

Darwin spent five years sailing round the world on HMS Beagle, then came home to sort through what he’d seen. In July 1837 he started a private notebook, Notebook B, on the idea that species aren’t fixed but change over time. It would be another 22 years before he published.

I Think / 1837 print artwork

What’s in the print

  1. The branching tree

    A redrawing of the sketch on page 36 of Notebook B: one ancestor at the root, splitting into branches that end in different species. It’s the first time Darwin drew evolution as a family tree.

  2. “I think”

    The two words he wrote above the sketch, before he’d worked out the rest. One of the most famous moments of hesitation in science.

  3. 1837

    The year he drew it, more than two decades before the world read the theory.

More from Edition 01

Model wearing the minimal Darwin Origin 1859 teeComing soon
Biology

Origin / 1859

Charles Darwin

The book that changed how we read life, 1859.

£38
Model wearing the Newton Invert the Orbit teeComing soon
Physics

Invert the Orbit

Isaac Newton

The apple, the Moon and one force behind both.

£38
Model wearing the Note G Ada Lovelace teeComing soon
Computing

Note G

Ada Lovelace

The first published computer program, 1843.

£38
Model wearing the Observation Tour teeComing soon
Tour print

Observation Tour

Dirty Scientist

From the smallest lens to the eclipsed Sun.

£38
I Think / 1837£38

Size guide

AS Colour Classic Tee 5026 · Relaxed unisex fit · centimetres

cmSMLXL2XL3XL
Half chest475256.5616468
Body length707477.5818487

One chart for everyone. These are garment measurements: lay a tee that fits how you like flat, and compare its width across the chest and its length.

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