PBS: Monday 16 February at 5.40pm

This documentary illustrates a scientific paradigm shift in real time, challenging everything we thought we knew about human history. It follows renowned archaeologist Ciprian Ardelean and other renegade scientists as they find that people arrived in the Americas far earlier than previously thought.

Over the span of several years, new evidence is unearthed from the pristine Canadian Arctic to southern Chile, including an astonishing discovery of ancient footprints which clearly show humans walking alongside mammoths and other megafauna on the same natural highway.

Who were these ancient people? When and how did they arrive in the Americas, and how did they survive an Ice Age? This is the biggest story in archaeology today.