The history of mankind begins with invention: The first stone tools were developed and Homo Sapiens thinking man appeared on the Earth.

It is impossible to count how many inventions have been made since that time. Everything that surrounds us was invented. For instance, we do not know who invented the sail the most significant invention of the human race. This invention survived thousands of years and always will be with us. There are projects with space ships having solar sails.

Can you imagine how that inventor felt setting up sail for the first time? Probably, it was a sunny, windy day. The first puff of wind filled the rough woven mat-sail, and the raft, shuddering for the first time, broke away from the land. The first mast in history started to bend and squeak. Sunlight danced on the waves, but the sailor paid no attention. His heart beat furiously. He did not know where the raft would land, and it was frightening to look back. But it did not matter here was the wonderful, insane moment of victory! For the first time the wind worked for humanity, and the raft moved forward loudly crashing against the waves.

The development, testing, and implementation of inventions always involves adventures. Victory over a technical problem takes flexibility of the brain and bravery no less then it took D'Artagnan to overcome the machinations of Cardinal Richelieu. By the way, a technical problem can sometimes be trickier, and more powerful,...