3.6 million years ago a small band of hominids walked on wet volcanic ash in Tanzania. The tracks are the oldest prints of their kind ever found, providing crucial evidence that walking on two legs was picked up early in the human lineage.

3.6 million years ago a small band of hominids walked on wet volcanic ash in Tanzania. The tracks are the oldest prints of their kind ever found, providing crucial evidence that walking on two legs was picked up early in the human lineage.

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