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Spider-like creatures help uncover the surprising origins of fatherhood

Citizen scientists have helped researchers solve a long-standing mystery about how parental care evolved in harvestmen. Using photos and observations from iNaturalist, scientists more than doubled the known cases of egg-guarding behavior and discovered that maternal and paternal care followed different evolutionary paths. The project, completed in just days with help from public data, shows how citizen science is transforming biological research on a global scale.

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