On February 19 (the birthday of Nicolaus Copernicus) Poland celebrates a new holiday, Polish Science Day in recognition of the achievements of Polish scientists. Here is our list of highlights over the last few years.
Used coffee grounds. If they don't end up in the trash, they can be used in peeling cosmetics or as a garden fertilizer. Now there is a chance that they can be used as... fuel for the fireplace or grill. A Warsaw University of Technology spin-off company is working on processing coffee grounds into briquettes.