It might be weird looking, but it gets the job done. Researchers at MIT have 3-D printed one of the strongest lightweight materials ever. It's 10 times stronger than steel–yet only 1/20th its density. The researchers published their findings in a new report in the peer-reviewed journal Science Advances. Their material has a strange shape to it, which is exactly what makes it so strong. It was made by taking flakes of graphene–a strong, lightweight, 2-dimensional form of carbon–compressing them, and fusing them together using 3-D printing.