How did humans get so smart? | Emma Novak | TEDxBerlin Cosmopolitan School Youth

Millions of years ago, early humans had small brains focused on survival and finding food. A pivotal change occurred when humans began walking on two legs, freeing their hands. These hands became the first tools, and the act of holding and making things stimulated brain growth and intelligence. The discovery of fire further boosted brain development by making food easier to eat and digest, providing more energy. Observing the stars and sun led to understanding seasons, enabling year-round farming. These advancements fostered living in groups, which promoted cooperation, knowledge sharing, and communication. The invention of symbols, words, and writing allowed knowledge to be passed down through generations. Humans have a long childhood, crucial for learning and developing intelligence. Key evolutionary drivers include bipedalism, tool use, fire, farming, and social living. Today, while computers assist, our brains continue to evolve through collective learning and mutual care.