Health SMART NEWS New Bionic Leg and Surgical Procedure Allow People to Walk With More Control After Amputations Will Sullivan SMART NEWS New Blood Test for Predicting Parkinson's Disease With A.I. Shows Promise, Study Suggests Christian Thorsberg SMART NEWS Researchers Breed Mice With Hybrid Brains Containing Cells From Rats Will Sullivan Environment SMART NEWS USDA Approves First Lab-Grown Chicken in the United States Will Sullivan SMART NEWS Could Genetically Modified Houseplants Clean the Air in Your Home? Alex Chun SMART NEWS New Hampshire Distillery Makes Whiskey Out of Invasive Crabs Margaret Osborne 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