I wonder that too.

"In each century since the beginning of the world, many wonderful things have been discovered. In the last century, more amazing things were found out than any in century before. In this new century hundreds of things still more astounding will be brought to light. At first people refuse to believe that a strange new thing can be done, then they begin to hope it can't be done, then they see it can be done - then it's done and all the world wonders why it was not done centuries ago."