MIT engineers have developed 3D-printed, interlocking glass bricks that are as strong as concrete and can be reused multiple times. These recyclable bricks, shaped like figure eights, can be easily assembled and disassembled, reducing the need for new building materials and minimizing carbon emissions. The bricks are made using recycled glass and can withstand similar pressures to traditional masonry, making them suitable for construction, such as building facades. The team aims to scale this technology for larger structures.