Students at the University College in Dublin watched as a mother duck waddled over a cement wall and landed one meter below. For her, it was nothing special. But for the yellow-feathered babies following her, it was an inconceivable feat. The ducklings peeped and milled around on the ledge above their mother. Finally one little duck jumped, landed on his side, and rolled to his feet. He chose to follow his mother, and his leap led to his siblings doing the same thing. Soon they all bounded from the ledge and trailed behind their mother as they continued their journey.