This week on Design Line, a secret city-building project surfaces in California,the Stirling Prize shortlist is released, and a crumbling concrete crisis hits.

Eshwarya Grover documents the work of Studio Raw Material turning Makrana’s marble industry offcuts into furniture.

Disegno reveals the secrets of Forward, Nike’s years-long confidential research project culminating in a new material made from plastic bottles.

The making of sand-cast aluminium chairs, designed by Moritz Schmid and Ville Kokkonen, using 3D-printed moulds by a family-run foundry in Switzerland.

Alice Twemlow visits Formafantasma at their home studio to discuss research, raw materials, and walking the line between climate crisis and commercial design.

Designer Kate Strudwick prototypes a modern forensics kit that could help clear the backlog of unsolved crimes.

Material design studio Polyfloss is working with recyclers, artists and craftspeople in Antananarivo, Madagascar, to spin waste plastic into a soft and flexible textile.