Climate change and overharvesting have put a Himalayan fungus valued for its purported aphrodisiac qualities at risk of extinction. Known variously as yarsagumba, yarchagumba, yartsa gunba, yatsa gunbu and, more colloquially, “Himalayan Viagra,” the parasitic caterpillar fungus Cordyceps ( Ophiocordyceps sinensis ) grows on and kills Tibetan ghost moths during their larval phase underground
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