Unearthed ancient human footprints a huge historical step
Dr Silvia Gonzalez, from Liverpool John Moores University, who led the team of researchers, said the findings were āthe tip of the icebergā and would help rewrite the history books.
She said the discovery, near to the city of Puebla, 130 kilometres south-east of Mexico City, challenges the traditionally held view that settlers first crossed the Bering Straits, from Russia to Alaska, at the end of the last ice age around 11,500 to 11,000 years ago.