What separates us from the animals? It's not self-awareness; even some birds have that. It's not empathy; dogs seem to have that too. It's also not the ability to use tools: archaeologists say that chimpanzees have been using stone tools for generations.
Move Over, Human Tools
How Do We Know?
Chimpanzees' Sophisticated Use Of Tools
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Key Facts In This Video
Chimps are careful about selecting which stones to use to crack open nuts. 00:22
Young chimpanzees often observe and mimic adults as they crack open nuts with rocks. 00:59
Like humans, chimps are either right- or left-handed. 02:30