How did we humans become so intelligent?

Why are we more intelligent than other animals? How did we evolve?
What is the biggest and most important point in this?

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shelfbark · T

some people say its our ability to use complex language

shelfbark · T

but also because of our problem solving ability

Mert5356 · 41-45, M

I know within the human skeletal system there is a passage way that allows air to flow through thus giving us an ability to speak. Chimps and apes do not have this and so cannot communicate as well. It led to further advancements and knowledge over time