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Decade-Long Drupal Maintenance Keeps AgeGuess Citizen Science Platform Running

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AgeGuess.org presents itself as a simple guessing game in which players estimate how old people look in photographs. Behind it is an open scientific database of perceived age, a biomarker used to study human ageing, built from more than 220,000 guesses submitted by citizen scientists in over 120 countries since 2012. The article is written by an independent French developer who maintained the platform on Drupal from 2014 to 2024, after taking over web development from earlier contributors. It describes how the platform's architecture serves both the public game and the research dataset, which has been published in Nature's Scientific Data. The piece also reflects on what sustaining a citizen science project over a decade requires in practice.

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