When was walking invented? Around 6 million years ago - USA TODAY

Bipedalism was seen in primates as far as 6 million years ago but they didn't fully walk on two limbs until 1.9 million years ago.

Most people use walking as their primary form of locomotion. It’s hard to imagine that millions of years ago, our ancestor primates crawled on four limbs and rarely walked on two limbs. Over time, hu… [+1784 chars]

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