Clown make-up may have a foundation in biology.
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April fools: as you may have spotted, this story is not true... enjoy your 1 April.
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Floap, L. Laughter brings out a red nose. Nature (2008). https://doi.org/10.1038/news.2008.715
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DOI: https://doi.org/10.1038/news.2008.715