Cave ecosystems thrive in the dark. What happens when tourists light them up?
In Belize’s Actun Tunichil Muknal cave, a sacred Maya site, plants grow in darkness, sparking concerns about how tourism affects its fragile ecosystem.
Nearsightedness is skyrocketing in kids. Sunshine can help.
Rates of nearsightedness, or myopia, are skyrocketing in kids—and scientists say it has to do with how little time they’re ...