Summary:

- Researchers have discovered ancient human footprints in New Mexico that provide evidence of early humans coexisting with mammoths and other extinct creatures around 23,000 years ago.
- The footprints, discovered in the White Sands National Park, are the oldest confirmed evidence of human activity in the Americas, predating the Clovis culture by several thousand years.
- The discovery challenges the widely held belief that the first humans arrived in the Americas around 13,000 years ago, and suggests that early humans may have arrived and spread across the continent much earlier than previously thought.