An anemometer is a device that measures wind speed. The word anemometer comes from the Greek word for wind, "anemos." In its most basic form, an anemometer uses three to four small hollow hemispheres that are mounted on a... [click here for more]

Since ancient times the rooster or cock has been used as a design element for weathervanes. Especially during ninth century Europe it was placed on the roofs of churches to symbolically ward off evil and to proclaim good faith. In ... [click here for more]