Human remains dating back 10,000 years have helped to rewrite the history book on America's earliest settlers.
Scientists have discovered an ancient footprint in Chile that is thought to date back around 15,600 years.
A new discovery has indicated that the first humans arrived in the Americas much earlier than thought.
New evidence has pushed the arrival of the first humans in the Americas back more than 1,500 years.
A remarkable new find has suggested that the Romans may have visited North America 2,000 years ago.