Summary:
- The article discusses the discovery of the oldest known human footprints found in the United States, dating back around 23,000 years.
- The footprints, discovered in New Mexico, provide evidence that humans were present in North America much earlier than previously thought, challenging the widely accepted theory that the first people arrived in the Americas around 13,000 years ago.
- The findings suggest that these early humans were capable of complex behaviors, such as using handcarts, and were able to adapt to the changing environment and landscape during the last Ice Age.