Each year, it’s fun to celebrate birthdays. If we’re not sure of someone’s age, we can always check their birth certificate. But can any reliable methods determine the age of an object without a historical record?
Leonardo da Vinci dreamed up a flying machine over 500 years ago, but it wasn’t until 1903 that the famous Wright brothers designed and successfully flew the first powered heavier-than-air aircraft. Since their inspiration came from studying the mechanics of pigeon wings in flight, the invention of airplanes is an awesome example of biomimicry—humans copying God’s design.