Our fourth episode starts with Lily and Lloyd standing on a sandbank in the North Sea, having sailed out in an old whelk boat. This sparks a new question from Lloyd - what exactly happened to Doggerland? As usual, the truth is more complicated - and more interesting - than he expected, as Lily explains sea levels, mammoths, sediment and mega-tsunamis with the help of Rachel Bynoe (@rachelbynoe), who has the glorious title of palaeolithic archaeologist at the University of Southampton and studies the submerged archaeology of the North Sea.

Credits: Podcast theme written exclusively for us by Ben Vize (@benvizemusic on Instagram)