Insipred by the Baya weaverbird’s nest, researchers at De Montfort University, Leicester (DMU) have developed a 3D-printed brick made out of plastic waste! Thermal insulation tests showed that the brick has a U-value of 0.25 Watts per metre Kelvin (W/m²K), which is 10 times more effective than a clay brick, which delivers an average of 2.94 W/m²K.