sciencenews Math puzzle: Shape-birding mforghan September 18, 2026 Solve the math puzzle from our October 2026 issue, in which a bird watcher seeks an indoor hobby. Post navigation Previous: عراق پرونده مناطق پرواز ممنوع را مختومه اعلام کردNext: ایرج طهماسب و همسرش؛ ۴۱ سال در کنار هم/ویدیو Related Stories sciencenews What’s behind ‘one of paleontology’s most enduring enigmas’? mforghan September 18, 2026 sciencenews Oversight Board blasts ‘inadequate’ Meta safeguards for AI deepfakes mforghan September 18, 2026 sciencenews China’s Hualong One nuclear unit enters commercial operation in Hainan mforghan September 18, 2026