Filmmaker Christopher Morris first saw the standing stone while on a walk through his favourite barley fields near his home in West Cornwall.
In the weeks and months that followed, he started to take pictures of it.
Then, armed with what he described as a rickety tripod, camera and zero budget, he began filming.
Over the next 12 months, and during 270 trips to the site near Penzance, it slowly evolved into A Year in a Field – a documentary film about climate change.
It also, he said, became a love letter to Cornwall and its wildlife, from the lichen that covers Boscawen-Ros standing stone at the field’s centre to its humble slugs, nocturnal badgers and swooping birds of prey.