This week's Open Country is a journey along a stretch of familiar coastline, but also back in time, to a far less familiar landscape. Emily Knight explores the Deep History Coast of North Norfolk, where the crumbling shoreline has given up some of the most impressive fossil remains ever discovered. To help her get a sense of the landscape that came before this one, she meets palaeontologist and author of "Otherlands", Dr Thomas Halliday, who explains what this ancient place would have looked like, how it might have felt to walk through it, and who you might have met along the way.

One of our companions on this stroll through time might have been a true giant of the past - four metres tall and weighing in at ten tonnes - the West Runton Mammoth. It's the most complete mammoth skeleton ever found, buried in the shifting sands of the beach for hundreds of thousands of years, before being discovered after a storm in 1990. While we stroll along a sandy beach, the West Runton Mammoth would have strolled instead along a muddy river-bed through a dense forest, surrounded by sights both familiar to us, and extraordinary: seven-foot tall deer, rhinos and hyaenas. Dr Tori Herridge, evolutionary biologist and elephant expert from the Natural History Museum, is on hand to talk about the life and death of this impressive creature, while local fossil-hunter Michelle Smith gives Emily a lesson in safe and sustainable fossil-hunting.

Alongside these extraordinary animals were people too - of a kind. Not quite our ancestors, more like our very distant cousins, Homo Heidelbergensis and Homo Antecessor both made their mark along this stretch of coastline. Dr David Waterhouse from Norfolk Museum explains how we think they might have lived, and what that tells us about our own origins.