Just how small is “nano?” In the International System of Units, the prefix “nano” means one-billionth, or 10-9; therefore one nanometer is one-billionth of a meter. It’s difficult to imagine just how small that is, so here are some examples: A sheet of paper is…

1. Windmills @unsplash/Jean Gerber Wind doesn’t just make your hair or cape look epic. It can also provide electricity for us to live by. From huge wind turbines to small little pin wheels, windmills have been used for energy harvesting for centuries. Today, large turbines…

1. Turn your water heater down! @pixabay/tiburi Many water heaters are set at scalding 140° F (60° C) by their manufacturer–while most households only need to be set a respectable 120°. Turning your water heater down these twenty or so degrees can save you hundreds…