A team of scientists in Chile say they've found a human footprint that dates back more than 15,000 years -- the oldest one ever found in the Americas https://t.co/V7Sv3ibeTL

A team of scientists in Chile say they've found a human footprint that dates back more than 15,000 years -- the oldest one ever found in the Americas https://t.co/V7Sv3ibeTL (via Twitter http://twitter.com/CNN/status/1123829739842674689)