Entomologists who collaborated to create Cicada Safari, a mobile app to collect citizen observations of periodical cicadas, hoped they could get 50,000 observations during the Brood X cicada emergence in 2021. They got that, and then some: Nearly 200,000 people downloaded the app, and they submitted more than 560,000 photographs and 28,000 videos. (Photo by Annkatrin Rose via iNaturalist, CC BY-NC 4.0