Sams was caught smoking with his friends, and the Principal Clark expelled them from the school. However, Sams reflected on his actions and decided that he is going to change his life for the better.
It is described how many tribes were drawn to live near the Nile River, and how these were united to form Egypt under Menes. The narrator then describes how canals were built, and how they became ancient Egypt's main system of transport. It is then detailed how ancient Egyptians took advantage of canals and what particular commodities were transported through the canals.
In this clip, Charlie suggests using an evolutionary algorithm to search for abnormal behavior after a murder occurs in a video game with a real-life component. Evolutionary algorithms imitate the biological process of natural selection to find optimal solutions.