Health SMART NEWS Oyster 'Blood' May Be the Secret Weapon in Our Fight Against Antibiotic-Resistant Superbugs, Study Finds Sarah Kuta SMART NEWS World-First Stem Cell Treatment Reverses Diabetes for a Patient in China, Study Suggests Margherita Bassi SMART NEWS New Bionic Leg and Surgical Procedure Allow People to Walk With More Control After Amputations Will Sullivan Environment SMART NEWS Eating Seaweed Could Make Cows Less Gassy, Slashing Methane Emissions From Grazing by Nearly 40 Percent Sarah Kuta SMART NEWS This New, Yellow Powder Quickly Pulls Carbon Dioxide From the Air, and Researchers Say 'There's Nothing Like It' Rudy Molinek SMART NEWS USDA Approves First Lab-Grown Chicken in the United States Will Sullivan Education SMART NEWS Tour a Submerged Cave Packed With Paleolithic Art—Without Ever Venturing Underwater Sarah Kuta SMART NEWS NASA’s New Solar Sail Could Soon Navigate in Space Elizabeth Gamillo SCIENCE Lost Cities of the Amazon Discovered From the Air Brian Handwerk