Science fiction made real in the news
Could self-healing road surfaces help fill in Britain's pothole crisis? Scientists at King's College, London, Swansea University, and colleagues in Chile may have cracked the problem. They have developed a form of asphalt that heals fractures in the road surface in an hour. The weight of traffic compresses the road surface, creating fissures, which allow water into the body of the surface. A cycle of freezing and thawing makes it worse. As this happens, the bitumen present in the asphalt will oxidise and harden, making it brittle. To prevent this happening, the team is including 'spores,' - tiny plant-based materials saturated with recycled oil - into the surface structure. That oil leaches into the road surface under the weight of traffic, restoring the surface's suppleness and preventing…