When did humans first step foot in what we now call North America? Did their arrival contribute to the disappearance of giant Ice Age animals? In 2021, archeologists presented new research on what they believe to be the oldest human footprints in North America. The ancient fossils—unmistakable footprints, some with...
When did humans first step foot in what we now call North America? Did their arrival contribute to the disappearance of giant Ice Age animals? In 2021, archeologists presented new research on what they believe to be the oldest human footprints in North America. The ancient fossils—unmistakable footprints, some with...