The document contains summaries of multiple topics: - The Little Ice Age described harsh winters in the 14th-19th century that caused famines and illnesses. - The Story of God discusses the origins of religion and people's beliefs in God/gods. - Journey of Man follows Spencer Wells and his research tracing human migration from Africa through blood samples. - Cracking the Maya Code describes the rediscovery of Maya temples and hieroglyphics by Spanish explorer Jose Calderon in the Yucatan Peninsula. - Conquistadors discusses Hernan Cortes, one of the first conquistadors who studied law but later followed Christopher Columbus and fought battles throughout Mexico. - Engineering and Empire