Design
How Reefvive is rebuilding coral reefs from discarded oyster shells
BY THE OPTIMIST DAILY EDITORIAL TEAM Most artificial reef structures are built from concrete. Concrete is smooth, and smooth surfaces give young coral little to grip. A team of students at National Taiwan Normal University built their version from something else entirely: ground oyster shells Read More...
Berlin's REWE supermarket: the grocery store with a working rooftop farm
BY THE OPTIMIST DAILY EDITORIAL TEAM The lettuce in REWE's Lankwitz store in Berlin has had a short morning. Grown on the rooftop farm directly above, cut, packaged by hand, and carried downstairs before most shoppers walk in, the whole trip from farm to shelf is measured not in miles but in Read More...
The world's largest battery-electric ferry just crossed an ocean
BY THE OPTIMIST DAILY EDITORIAL TEAM In 2019, a South American transport company ordered a diesel ferry. By the time it launched six years later, it had become the largest electric vehicle ever built, of any kind, on land or sea. Hull 096 is a 130-meter (427-foot) battery-electric ferry built Read More...
The world's first solar ambulance just completed its first real-world test in rural Kenya
BY THE OPTIMIST DAILY EDITORIAL TEAM The question most ambulances are designed to answer is how fast a patient can reach a hospital. In the Narok region of Kenya, where long distances and unreliable electricity make quality healthcare difficult to access, that question has no good answer. The Read More...
Meet the Bioloon: the biodegradable balloon aiming for shelves by 2028
BY THE OPTIMIST DAILY EDITORIAL TEAM Balloons have always been made from natural latex, a material derived from rubber tree sap. Natural latex is biodegradable. The rubber tree has been producing it since before the first balloon was invented in 1824. On its own, it breaks down. The problem is Read More...
The robots kids build to preserve Native American languages
BY THE OPTIMIST DAILY EDITORIAL TEAM The U.S. Indian boarding school system spent decades trying to remove Native American languages from Native children. Kids were separated from their families and punished, sometimes violently, for speaking their mother tongues. Many never passed those Read More...
3D-printed bone implants that release drugs as they heal
BY THE OPTIMIST DAILY EDITORIAL TEAM Czech researchers at the University of Chemistry and Technology in Prague are building titanium joint implants with a porous internal structure designed to hold medication and release it gradually after surgery. The project is a collaboration with surgeons at Read More...
The biodegradable, self-cleaning fabric made from living caterpillar fungus
BY THE OPTIMIST DAILY EDITORIAL TEAM The sustainable fashion industry has spent years trying to reduce harm: less water, fewer synthetic chemicals, more recycled material. A research team at the Shenzhen Institutes of Advanced Technology went in a different direction. They grew the fabric from a Read More...
How the soccer cleat evolved from hardware nails to engineered fabric
BY THE OPTIMIST DAILY EDITORIAL TEAM Nobody watches the World Cup to think about footwear. But the shoes on the pitch at the 2026 tournament are the end result of about 500 years of iteration, and the story is stranger than you’d expect. It involves a family feud, kangaroo leather, and at one Read More...
How reflective roof paint is cooling homes across Africa
BY THE OPTIMIST DAILY EDITORIAL TEAM The question seemed reasonable enough: what heat adaptation interventions were already working in Africa’s low-income communities? Lara Dugas, an epidemiologist, and climate scientist Mark New had received funding from the Wellcome Trust’s HeatNexus Read More...