So, we've gone from covered wagons to going to the moon in...

So, we've gone from covered wagons to going to the moon in just under 100 years. For all the centuries and thousands of years before us, people walked or rode horses, cows, camels or whatever. This so-called modern era, from the late 19th century through now, has been the period of the most amazing development, discovery, innovation and acceleration of change that humans have ever experienced. And it hasn't slowed down yet.