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
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
Dive Deeper Into Evolution
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