Bendable concrete, made with woven fibers, flexes to absorb pressure, temperature changes, and movement. Collapsible concrete, a composite of special fibers and regular concrete, is lighter and requires less energy to produce. It can be used to patch existing potholes or cracks. Further research is needed before it is widely implemented. Since we use “concrete” […]
Smallpox was eradicated in 1979, but live virus samples are still kept in labs for research purposes. Some scientists worry about the safety of these samples and the possibility of bioterrorism. Countries have checked their vaccine stockpiles and companies keep virus samples for vaccine production. Smallpox is an acute, infectious virus that has historically devastated […]
