A fruiting body of the Ophiocordyceps fungus extends from the head of an infected ant. Ant zombification begins when an Ophiocordyceps fungus shoots spores onto an insect. The parasitic fungus gradually takes over the ant's brain and directs the insect to a cool, moist location. The fungus then kills the ant, and fruiting bodies erupt from the ant's head and spread more spores.

Photograph courtesy David Hughes, Penn State University

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