These 3D-Printed Concrete Shelters Can Save People During Tornados

About 1 in 15 people in the U.S. live in manufactured homes, according to the U.S. Department of Housing and Urban Development. And many of these communities lack access to shelter during extreme weather events. Researchers at Kansas State University have turned to 3D-printed concrete shelters to see if the emerging technology can help these people stay safe. Reese Greenlee is an assistant…