We all want to achieve great things in life. But we don't know where to start. Or we start something with hope but can't keep it going, so we move on to other goals.
A single domino can knock over another, 50% bigger, as was proved in a test conducted in 1983 by physicist Lorne Whitehead at the University of British Columbia.
The young athlete, who entered the final meters of the high school track and field competition ahead, made up for her mistake with a great move and managed to cross the finish line first.