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American Museum of Natural History.
Ladies Happiness Is Molecular T-Shirt
Ladies pale gray t-shirt with the saying "Happy Is Molecular" and featuring the molecular structure for Serotonin, a neurotransmitter that mediates satisfaction, happiness and optimism. It will also make the wearer happy to know the material is an eco-friendly mix of polyester made with up to 5% recycled plastic bottles and pesticide-free organic cotton. That's a real mood-enhancer. Cap sleeves. Machine washable.