Add/Subtract T-Shirt

Featured on the cover of Sidney Harris’s You Want Proof book of science cartoons.

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Glows in the dark

Winter Star Chart Shirt $24.00 – $47.00

Navy

Small Medium Large X-Large XX-Large +$1.00 Youth Small 6-8 Youth Medium 10-12 Youth Large 14-16 Sweatshirt Small Sweatshirt Medium Sweatshirt Large Sweatshirt X-Large Sweatshirt XX-Large +$2.00

Printed upside down in glow-in-the-dark ink so the wearer can really use it.

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Mars Probe T-Shirt $24.00 – $25.00

This Sidney Harris Mars Probe cartoon demonstrates that all is fair in love, war, and interplanetary exploration.

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Theories and Proofs T-Shirt $24.00 – $25.00

So many theories, so little proof.

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Glows in the dark

Starry Night Shirt $24.00 – $47.00

Black

Small Medium Large X-Large XX-Large +$1.00 Youth Small 6-8 Youth Medium 10-12 Youth Large 14-16 Sweatshirt Small Sweatshirt Medium Sweatshirt Large Sweatshirt X-Large Sweatshirt XX-Large +$2.00

Glow-in-the-dark design uses clusters of celestial objects to illuminate the world’s most renowned physicist.

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Spleen T-Shirt $24.00 – $25.00

White

Another great medical cartoon from Sidney Harris and Cotton Expressions.

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Fibonacci T-Shirt $24.00 – $25.00

Navy

From daisy petals to seeds of corn, Fibonacci’s sequence explains numbers found in nature.

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The Part I Hate T-Shirt $24.00 – $25.00