I found several hand-size shells on a Baja beach last winter, and learned they’re called pen shells. I would have named the translucent beauties fan shells, since they look like fluted fans decorated ...

Add Yahoo as a preferred source to see more of our stories on Google. The endangered Mediterranean mollusk Pinna nobilis, pictured in Spain. The golden silk, a luxury once reserved for Roman emperors, ...

🛍️ Amazon Big Spring Sale: 100+ editor-approved deals worth buying right now 🛍️ By Yook JiHun Published Aug 8, 2025 10:00 AM EDT Add Popular Science (opens in a new tab) Adding us as a Preferred ...