The earliest recorded instance of heeled shoes comes from tenth century Persia. Mounted soldiers wore shoes with heels to make it easier to keep their feet in their stirrups, as the heels would catch the back of the stirrup’s tread and stop their feet from sliding in and out. This same use can be seen to this day with cowboys and other jobs that involve riding horses. During this period heels went from being a masculine sign of strength and wealth to a non-gendered court fashion to a feminine fashion statement.
What makes something living? What are the characteristics of living things? All life has a common origin, but how do we know? This lesson examines various characteristics that define life and the origin of life. Various famous scientists and their biological discoveries are also discussed.