Yellow Ibis, purveyors of fabulous science-themed t-shirts and other apparel, are having a Halloween sale: 20% off orders of $30 or more, or 3€ off any purchase of at least 15€. See the Yellow Ibis blog for details.
Shown right: Feynman Diagram T-Shirt
See my previous post about Yellow Ibis: Create Your Own Chemical T-Shirt
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