Travelling the world paying attention to what is happening in the field of design always reminds you that, in the era of globalisation, it is more about what we have in common than what separates us. Amongst designers it is common to find affinities and concerns that intrigue the contemporary designer. My last exhibition as a curator, Materia Gris, features designers with a specific interest in exploring new materials. The potential of an unstoppable flow of matter discarded by humans presented an opportunity for many designers to set to come with solutions to this problem. The exhibition is about new materials, but also about the intelligence behind their development. A lot of grey matter in the service of the environment, of humanity, hence the title. Lucas Muñoz, a designer interested in the circular economy, made an installation from all the material accumulated in the CentroCentro art centre’s warehouses, and added a further level of social impact by involving the Norte Joven association in the manufacture of lamps that visitors can purchase at the end of the show. The exhibition showcases a selection of forty projects in which different designers demonstrate their approach to new non-synthetic bio-based materials, focusing on projects in which the raw materials can be as varied as algae, fungi, bacteria, human hair, paper, pine bark and needles, leather, salt, snail droppings, mussel shells, animal bones, sawdust, corn and potato starch, olive pits, flax, glass bottles, charcoal from vegetable residues, fruit, etc.