Leonardo da Vinci first dreamed up a flying machine, but it wasn’t until 1903 that the famous Wright brothers designed and successfully flew the first heavier-than-air aircraft. With their inspiration coming from studying the mechanics of pigeon wings in flight, the invention of airplanes is an awesome example of biomimicry—humans copying God’s design.
There aren’t any astronomical reasons why a week has seven days. Or why we traditionally work for six of those days and rest on the seventh. Why is a week seven days long?