It’s taken almost two years, 15 pairs of trainers and more than 400 flights for Nick Butter to run 26.2 miles in each of the 196 countries on the planet.
Technically an aluminium-air fuel cell, the idea is that these can be swapped out at supermarkets and recycled when spent.
Researchers at the University of Illinois at Chicago have successfully tested a lithium-carbon dioxide battery prototype running up to 500 consecutive cycles of charge/recharge processes.
Since little equipment is needed to administer the cast, it’s also been suggested for use in wilderness first aid.
Ultimately, it plans to be climate-positive (reducing more emissions than it puts out) by 2030.
A team of researchers from Zhejiang University School of Medicine has developed a gel that makes enamel repair itself.
The new packaging is 100% plastic-free and made from plant-based biodegradable fibres.